Collector List, Tom Schweich, Page 9

East Side of the West	Collector's List for Tom Schweich Page 9
Tom Schweich

Field Notes: Coll. No. 3200, 29 Aug 2023.

Name List: Humulus neomexicanus

3200. Humulus neomexicanus (A. Nelson & Cockerell) Rydb. Mouth of Clear Creek Canyon, beside the flume of the Welch Ditch, 2.53 km. (geodesic) west southwest of the GNIS location of Golden. (39.7468,-105.2483,WGS 1984) Sunny southwest-facing site, upper side of the flume, in a small steep gulch, with Holodiscus dumosus, and Cercocarpus montanus. 8/28/2023 Welch Ditch, Jefferson County, Colorado. (d: COLO(122) , d: CS(124) , CAS718154^‡ , CDA56593^‡ )

Coll. No. 3200, Humulus neomexicanus

Coll. No. 3200, Humulus neomexicanus.

Field Notes: Coll. No. 3201, 29 Aug 2023.

Name List: Humulus neomexicanus

3201. Humulus neomexicanus (A. Nelson & Cockerell) Rydb. Mouth of Clear Creek Canyon, along the Welch Ditch in a small steep gulch, 2.55 km. (geodesic) west southwest of the GNIS location of Golden. (39.7447,-105.2486,WGS 1984) Upper side of flume, wetter site, edge of Douglas fir and water birch. GPS coordinates inaccurate due to cliffs in the canyon; actual location about 80 meters to the northeast. One of three collections of hops made along the ditch this day. 8/29/2023 Welch Ditch, Jefferson County, Colorado. (d: EIU(126) , COLO , CS202194^‡ , JCOSs.n. , KHD 87494^‡ , OBI^‡ , REGISs.n. , UCR308525^‡ )

Coll. No. 3201, Humulus neomexicanus.

Field Notes: Coll. No. 3202, 29 Aug 2023.

Name List: Ambrosia trifida

3202. Ambrosia trifida L. West end of Golden History Park, at the western entrance gate, 395 m. west of the GNIS location of Golden. (39.7547,-105.2256,WGS 1984) Most likely native to Golden, but found in an area of planted, non-native, vegetation. 8/29/2023 Golden History Park, Jefferson County, Colorado. (d: CS(124) , d: CDA(120) , KHD ^‡ )

Coll. No. 3202, Ambrosia trifida.

Field Notes: Coll. No. 3203, 29 Aug 2023.

Name List: Chenopodium album

3203. Chenopodium album L. West end of Golden History Park, at the western entrance gate, 395 m. west of the GNIS location of Golden. (39.7547,-105.2255,WGS 1984) Apparently naturalized, found in an area of native and non-native vegetation. 8/29/2023 Golden History Park, Jefferson County, Colorado. (d: REGIS(128) , d: EIU(126) , CS )

Coll. No. 3203, Chenopodium album.

Field Notes: Coll. No. 3204, 29 Aug 2023.

Name List: Humulus lupulus

3204. Humulus lupulus L. Escaping the cultivated demonstration garden at the Golden History Park, adjacent to 11th Street, about 290 m. west of the GNIS location of Golden. (39.7551,-105.2245,WGS 1984) 8/29/2023 Golden History Park, Jefferson County, Colorado. (JCOS , KHD ^‡ )

Coll. No. 3204, Humulus lupulus.

Field Notes: Coll. No. 3205, 30 Aug 2023.

Name List: Humulus neomexicanus

3205. Humulus neomexicanus (A. Nelson & Cockerell) Rydb. (39.7492,-105.2504,WGS 1984) Combined with 3199, repeat for larger leaves. 8/30/2023 Welch Ditch, Jefferson County, Colorado. (Undist. )

Coll. No. 3205, Humulus neomexicanus

Field Notes: Coll. No. 3206, 30 Aug 2023.

Name List: Froelichia gracilis

3206. Froelichia gracilis (Hook.) Moq. Mouth of Clear Creek Canyon, in loose gravel and rocks between cliff and the flume of Welch Ditch, 2.60 km. (geodesic) west southwest of the GNIS location of Golden. (39.7475,-105.2497,WGS 1984) Upper side of flume only, not seen below. Only plant growing here. 8/30/2023 Welch Ditch, Jefferson County, Colorado. (CS202199^‡ , JCOSs.n. , KHD ^‡ , OBI^‡ )

Coll No. 3206, Froelichia gracilis.

Coll. No. 3206, Froelichia gracilis.

Field Notes: Coll. No. 3206.5, 7 Sep 2023.

Name List: Cenchrus longispinus

3206.5 Cenchrus longispinus (Hack.) Fern. Annual grass, collected in its second growing season at this site, suggesting it is naturalized here. In planted native grass beds, along 23rd Street, opposite Vernon Drive, 1.72 km. southeast of the GNIS location of Golden. (39.7489,-105.2080,WGS 1984) Native to Colorado, but usually found in sandy habitats. Not previously collected at any other location in or near Golden; unclear whether this grass was previously here, brought in with the soil amendment, or was a contaminant in the seed mix. DeLong Park was a private residence that was left fallow for a number of years, then converted to a city park in 2021-2022. 9/7/2023 DeLong Park (City of Golden), Jefferson County, Colorado. (d: UCR(119) , OBI )

Coll. No. 3206.5, Cenchrus longispinus.

Field Notes: Coll. No. 3207, 8 Sep 2023.

Name List: Symphyotrichum porteri

3207. Symphyotrichum porteri (A. Gray) G.L. Nesom. Work or parking area in front of ranch sheds, 40 m. southeast of the Centennial Ranch house, 15.8 km. (geodesic) northwest of Golden. (39.7945,-105.3538,WGS 1984) With Dieteria bigelovii. Distance from Golden was measured as 15.8 km in planar mode in error, whereas a more accurate distance would be 12.2 km. measured in geodesic mode. 9/8/2023 Guy Gulch, Jefferson County, Colorado. (d: COLO(122) , d: EIU(126) , d: UCR(119) , KHD ^‡ )

Field Notes: Coll. No. 3208, 8 Sep 2023.

Name List: Dieteria bigelovii var. bigelovii

3208. Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartman var. bigelovii. Work or parking area in front of ranch sheds, 40 m. southeast of the Centennial Ranch house, 15.8 km. (geodesic) northwest of Golden. (39.7945,-105.3538,WGS 1984) With Symphyotrichum porteri. Distance from Golden was measured as 15.8 km in planar mode in error, whereas a more accurate distance would be 12.2 km. measured in geodesic mode. 9/8/2023 Guy Gulch, Jefferson County, Colorado. (d: COLO(122) , d: OBI(118) , d: REGIS(128) , JCOS )

Field Notes: Coll. No. 3209, 8 Sep 2023.

Name List: Humulus lupulus

3209. Humulus lupulus L. In a culvert with flowing water on the northeast side of County Road 70, 35 m. south of the Centennial Ranch house, 12.2 km. (geodesic) west northwest of the GNIS location of Golden. (39.7944,-105.3540,WGS 1984) 9/8/2023 Guy Gulch, Jefferson County, Colorado. (d: COLO(122) , d: OBI(118) , JCOS , KHD ^‡ )

Coll. No. 3209, Humulus lupulus.

Field Notes: Coll. No. 3210, 8 Sep 2023.

Name List: Cirsium arvense

3210. Cirsium arvense (L.) Scop. Weed: CO DofA, List: B. Broken shade up a small gulch 30 m. northeast of the Centennial Ranch house, 12.2 km. (geodesic) northwest of the GNIS location of Golden. (39.7949,-105.3538,WGS 1984) Colorado Noxious Weed List B. EDDMaps: 11926494. 9/8/2023 Guy Gulch, Jefferson County, Colorado. (CS )

Coll. No. 3210, Cirsium arvense.

Field Notes: Coll. No. 3211, 8 Sep 2023.

Name List: Agrostis gigantea

3211. Agrostis gigantea Roth. Fine grass, ~~rhizomatous~~ stoloniferous. Shaded streamside 35 m. behind and northeast of the Centennial Ranch house, 12.2 km. (geodesic) northwest of the GNIS location of Golden. (39.7949,-105.3538,WGS 1984) 9/8/2023 Guy Gulch, Jefferson County, Colorado. (KHD ^‡ )

Coll. No. 3211, ~~Agrostis stolonifera~~ Agrostis gigantea.

Field Notes: Coll. No. 3212, 8 Sep 2023.

Name List: Lathyrus latifolius

3212. Lathyrus latifolius L. Weed: CO DofA, List: Watch. In the gulch about 45 m. behind and northeast of the Centennial Ranch house, 12.2 km. (geodesic) northwest of the GNIS location of Golden. (39.7951,-105.3538,WGS 1984) In the open beside stream, also here: Cirsium arvense, Campanula rapunculoides, Arctostaphylos uva-ursi, and Agrostis stolonifera. 9/8/2023 Guy Gulch, Jefferson County, Colorado. (d: REGIS(128) , d: COLO(122) , JCOS , KHD ^‡ )

Coll. No. 3212, Lathyrus latifolia.

Field Notes: Coll. No. 3213, 8 Sep 2023.

Name List: Arctostaphylos uva-ursi

3213. Arctostaphylos uva-ursi (L.) Sprengel. In the gulch about 45 m. behind and northeast of the Centennial Ranch house, 12.2 km. (geodesic) northwest of the GNIS location of Golden. (39.7950,-105.3539,WGS 1984) Base of small Ponderosa pine, also here: Cirsium arvense, Campanula rapunculoides, Lathyrus latifolia, and Agrostis stolonifera. 9/8/2023 Guy Gulch, Jefferson County, Colorado. (JCOSs.n. , KHD87501^‡ )

Field Notes: Coll. No. 3214, 8 Sep 2023.

Name List: Campanula rapunculoides

3214. Campanula rapunculoides L. In the gulch about 55 m. behind and northeast of the Centennial Ranch house, 12.2 km. (geodesic) northwest of the GNIS location of Golden. (39.7952,-105.3537,WGS 1984) Nearly all vegetative, beside stream, rooted in moss. EDDMaps: 11942190. 9/8/2023 Guy Gulch, Jefferson County, Colorado. (JCOS , KHD ^‡ )

Coll. No. 3214, Campanula rapunculoides.

Field Notes: Coll. No. 3215, 8 Sep 2023.

Name List: Carex aurea

3215. Carex aurea Nutt. In the gulch about 75 m. behind and northeast of the Centennial Ranch house, 12.2 km. (geodesic) northwest of the GNIS location of Golden. (39.7954,-105.3536,WGS 1984) In ponderosa pine duff beside creek. 9/8/2023 Guy Gulch, Jefferson County, Colorado. (KHD ^‡ )

Coll. No. 3215, Carex aurea.

Field Notes: Coll. No. 3216, 8 Sep 2023.

Name List: Epilobium ciliatum

3216. Epilobium ciliatum Raf. In the gulch about 140 m. behind and northeast of the Centennial Ranch house, 12.2 km. (geodesic) northwest of the GNIS location of Golden. (39.7959,-105.3533,WGS 1984) Rooted in stream. 9/8/2023 Guy Gulch, Jefferson County, Colorado. (d: CS(124) , JCOS )

Field Notes: Coll. No. 3217, 8 Sep 2023.

Name List: Heliomeris multiflora var. multiflora

3217. Heliomeris multiflora Nutt. var. multiflora. Southeast-facing hill slope abobe the gulch about 285 m. behind and northeast of the Centennial Ranch house, 12.2 km. (geodesic) northwest of the GNIS location of Golden. (39.7971,-105.3528,WGS 1984) 9/8/2023 Guy Gulch, Jefferson County, Colorado. (d: REGIS(128) , d: OBI(118) , d: EIU(126) , JCOS )

Field Notes: Coll. No. 3218, 12 Sep 2023.

Name List: Brickellia eupatorioides

3218. Brickellia eupatorioides (L.) Shinners. Near the northern border of Schweich Hill, in the eastern section that was mowed by neighbors for about twenty years, 1.75 km. (geodesic) north northwest of the GNIS location of Golden. (39.7688,-105.2320,WGS 1984) 20-30 plants mostly concentrated in a 10 m x 10 m patch, scattered in Bromus inermis with Artemisia dracunculus, Ericameria nauseosa var. graveolens, and Liatris punctata. Mowing occurred from approximately 2007 to 2018. Other collections may identify this location as “North Washington Open Space.” 9/12/2023 Schweich Hill, Jefferson County, Colorado. (d: COLO(122) , d: EIU(126) , d: CS(124) , OBI )

General location of Coll. No. 3218, Brickellia eupatorioides.

Coll. No. 3218, Brickellia eupatorioides.

Field Notes: Coll. No. 3219, 12 Sep 2023.

Name List: Artemisia ludoviciana ssp. ludoviciana

3219. Artemisia ludoviciana Nutt. ssp. ludoviciana. Near the western border of Schweich Hill, about mid-way up the slope, 1.81 km. (geodesic) north northwest of the GNIS location of Golden. (39.7685,-105.2339,WGS 1984) This area was graded then revegetated circa 2006, though this taxon is more likely adventive rather than revegetated. Other collections may identify this location as “North Washington Open Space.” 9/12/2023 Schweich Hill, Jefferson County, Colorado. (CAS718172^‡ , CDA56591^‡ , OBI^‡ , UCR307021^‡ )

Field Notes: Coll. No. 3220, 12 Sep 2023.

Name List: Ambrosia psilostachya

3220. Ambrosia psilostachya DC. Plants of short stature. Top of hill, center of parcel, 1.77 km. (geodesic) north northwest of the GNIS location of Golden. (39.7685,-105.2330,WGS 1984) Southwest aspect, top of hill, gravel-covered upturned Laramie and Arapahoe Formations. Other collections identify this location as “North Washington Open Space.” 9/12/2023 Schweich Hill, Jefferson County, Colorado. (d: COLO(122) , d: CAS(121) , UCR )

Field Notes: Coll. No. 3221, 17 Sep 2023.

Name List: Gutierrezia sarothrae

3221. Gutierrezia sarothrae (Pursh) Britton & Rusby. Northwest corner of the Survey Field, highest Great Plains at base of Rocky Mountain Front Range scarp, 1.92 km. southwest of the GNIS location of Golden (39.7397,-105.2300,WGS 1984) With Bouteloua gracilis, Bromus inermis, Ambrosia psilostachya, and Helianthus pumilus. 9/17/2023 Colorado School of Mines Survey Field, Jefferson County, Colorado. (d: COLO(122) , OBI^‡ , REGISs.n. , UCR306972^‡ )

Field Notes: Coll. No. 3222, 17 Sep 2023.

Name List: Solidago nemoralis ssp. decemflora

3222. Solidago nemoralis Aiton ssp. decemflora (de Candolle) Brammall ex Semple. Northwest corner of Survey Field, north-facing slope of small gulch, 1.97 km. southwest of the GNIS location of Golden. (39.7390,-105.2294,WGS 1984) Highest Great Plains at base of Rocky Mountain Front Range scarp, with Juniperus scopulorum and Pinus ponderosa. 9/17/2023 Colorado School of Mines Survey Field, Jefferson County, Colorado. (d: REGIS(128) , d: CS(124) , d: EIU(126) , UCR )

Coll. No. 3222, Solidago nemoralis ssp. decemflora.

Field Notes: Coll. No. 3223, 17 Sep 2023.

Name List: Ambrosia psilostachya

3223. Ambrosia psilostachya DC. Very similar to Coll. No. 3224, but much more tall. Mixed grass prairie, highest Great Plains at the Rocky Mountain Front Range scarp, northwest corner of the Survey Field, 2.02 km. southwest of the GNIS location of Golden. (39.7386,-105.2293,WGS 1984) Common plant of the plains of Colorado, especially up against the Front Range, also found at lower elevations on the west slope. 9/17/2023 Colorado School of Mines Survey Field, Jefferson County, Colorado. (d: CS(124) , CDA )

Field Notes: Coll. No. 3224, 17 Sep 2023.

Name List: Ambrosia psilostachya

3224. Ambrosia psilostachya DC. Very similar to Coll. No. 3223, but more compact plant. Mixed grass prairie, highest Great Plains at the Rocky Mountain Front Range scarp, northwest corner of the Survey Field, 2.02 km. southwest of the GNIS location of Golden. (39.7385,-105.2294,WGS 1984) Common plant of the plains of Colorado, especially up against the Front Range, also found at lower elevations on the west slope. 9/17/2023 Colorado School of Mines Survey Field, Jefferson County, Colorado. (d: EIU(126) , CofG )

Field Notes: Coll. No. 3225, 17 Sep 2023.

Name List: Andropogon gerardii

3225. Andropogon gerardii Vitman. Northwest corner of the Survey Field, mixed grass prairie, highest Great Plains at the Rocky Mountain Front Range scarp, 2.04 km. southwest of the GNIS location of Golden. (39.7383,-105.2294,WGS 1984) 9/17/2023 Colorado School of Mines Survey Field, Jefferson County, Colorado. (d: UCR(119) , d: CDA(120) , d: CS(124) , OBI )

Field Notes: Coll. No. 3226, 17 Sep 2023.

Name List: Ericameria nauseosa var. graveolens

3226. Ericameria nauseosa (Pall. ex Pursh) G.L.Nesom & G.I.Baird var. graveolens (Nutt.) Reveal & Schuyler. Northwest corner of the Survey Field, mixed grass prairie, highest Great Plains at the Rocky Mountain Front Range scarp,2.09 km. (geodesic) south southwest of the GNIS location of Golden. (39.7379,-105.2292,WGS 1984) Gravelly open fields with Rhus trilobata, Artemisia dracunculus, Prunus virginiana, and Thinopyrum intermedium, but beside a small perennial stream that is probably overflow from a nearby city water tank. 9/17/2023 Colorado School of Mines Survey Field, Jefferson County, Colorado. (d: COLO(122) , d: EIU(126) , d: CS(124) , CAS )

Field Notes: Coll. No. 3227, 17 Sep 2023.

Name List: Eriocoma robusta

3227. Eriocoma robusta (Vasey) Romasch. Northwest corner of the Survey Field, mixed grass prairie, highest Great Plains at the Rocky Mountain Front Range scarp,2.09 km. (geodesic) south southwest of the GNIS location of Golden. (39.7373,-105.2289,WGS 1984) Gravelly open fields with Rhus trilobata, Artemisia dracunculus, A. ludoviciana, Ericameria nauseosa var. graveolens, Prunus virginiana, and Thinopyrum intermedium. iNaturalist: 183708052. 9/17/2023 Colorado School of Mines Survey Field, Jefferson County, Colorado. (d: EIU(126) , d: CS(124) , KHD 87394^‡ , OBI^‡ )

Field Notes: Coll. No. 3228, 19 Sep 2023.

Name List: Heliomeris multiflora var. multiflora

3228. Heliomeris multiflora Nutt. var. multiflora. Mouth of Magpie Gulch on the southeast flank of Mount Galbraith, 1.72 km. (geodesic) west northwest of the GNIS location of Golden. (39.7595,-105.2405,WGS 1984) Floor of gulch, full sun and high shade, with Symphyotrichum porteri, Cynoglossum officinale, Hypericum perforatum, Mentha spicata, Monarda fistulosa, and Rubus deliciosus. 9/19/2023 Magpie Gulch, Jefferson County, Colorado. (d: CofG(125) , d: CAS(121) , d: CDA(120) , UCR )

Field Notes: Coll. No. 3229, 19 Sep 2023.

Name List: Symphyotrichum porteri

3229. Symphyotrichum porteri (A. Gray) G.L. Nesom. Mouth of Magpie Gulch on the southeast flank of Mount Galbraith, 1.72 km. (geodesic) west northwest of the GNIS location of Golden. (39.7594,-105.2406,WGS 1984) Floor of gulch, full sun and high shade, with Heliomeris multiflora, Cynoglossum officinale, Hypericum perforatum, Mentha spicata, Monarda fistulosa, and Rubus deliciosus. 9/19/2023 Magpie Gulch, Jefferson County, Colorado. (d: CDA(120) , d: CofG(125) , d: UCR(119) , OBI )

Checklist Flora of Native and Naturalized Vascular Plants of Golden and Vicinity, Jefferson County, Colorado: Fallopia baldschuanica. Tucker Gulch Trail, Golden, Colorado: just above bridge. Field Notes: Coll. No. 3230, 29 Sep 2023.

Name List: Fallopia baldschuanica

3230. Fallopia baldschuanica (Regel) Holub. Side yard of 405 Garden Glen Ct., Colden, CO. (39.7651,-105.2249,WGS 1984) Sprawling over a green ash (Fraxinus pennsylvanica Marshall) and fence for about 10 m., coming across onto the City of Golden Tucker Gulch Trail, no sign of rooting away from fence line. Also seen on top of Cemetery Hill (Gregory Drive), and 1000 19th Street. iNaturalist: 185490713. EDDMaps: 11556331. 9/29/2023 Tucker Gulch (lower), Jefferson County, Colorado. (d: CofG(125) , d: REGIS(128) , d: COLO(122) , CDA56581^‡ , CS202037^‡ , JCOS , KHD ^‡ , OBI^‡ )

View of Coll. No. 3230, Fallopia baldschuanica, from south.

View of Coll. No. 3230, Fallopia baldschuanica, from north..

Coll. No. 3230, Fallopia baldschuanica.

Field Notes: Coll. No. 3231, 12 Apr 2024.

Name List: Claytonia rosea

3231. Claytonia rosea Rydb. 155 m. west southwest of Coal Creek Canyon Fire Department Station 3. (39.8728,-105.2794,WGS 1984) In an open thicket of Prunus virginiana on an outwash plain. 4/12/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (JCOS , x-CDA )

Field Notes: Coll. No. 3232, 12 Apr 2024.

Name List: Pulsatilla nuttalliana

3232. Pulsatilla nuttalliana (DC.) Bercht. & J. Presl. 280 m. northwest of Coal Creek Canyon Fire Department Station 3, 14.2 km. north northwest of Golden. (39.8752,-105.2796,WGS 1984) Open rocky field, recognizable here at this early date: Lomatium orientale, Echinocereus viridiflorus, Yucca glauca, and Carex inops ssp. heliophila. 4/12/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: REGIS(141) , JCOS )

Field Notes: Coll. No. 3233, 15 Apr 2024.

Name List: Populus deltoides ssp. monilifera

3233. Populus deltoides Marshall ssp. monilifera (Aiton) Eckenw. Staminate catkins. (39.7591,-105.2329,WGS 1984) 4/15/2024 New Loveland Mine Park, Jefferson County, Colorado. (Discarded )

Staminate catkins on Coll. No. 3233, Populus deltoides.

Fragmenting collection of staminate catkins, Coll. No. 3233, Populus deltoides monilifera.

Field Notes: Coll. No. 3234, 15 Apr 2024.

Name List: Populus deltoides ssp. monilifera

3234. Populus deltoides Marshall ssp. monilifera (Aiton) Eckenw. Staminate catkins. (39.7581,-105.2328,WGS 1984) 4/15/2024 New Loveland Mine Park, Jefferson County, Colorado. (Discarded )

Field Notes: Coll. No. 3235, 16 Apr 2024.

Name List: Populus deltoides ssp. monilifera

3235. Populus deltoides Marshall ssp. monilifera (Aiton) Eckenw. Pistillate catkins. At the headgate of the Church Ditch. (39.7523,-105.2453,WGS 1984) 4/16/2024 Clear Creek Canyon, Jefferson County, Colorado. (Discarded )

Pistillate catkins on Coll. No. 3235, Populus deltoides.

Field Notes: Coll. No. 3236, 24 Apr 2024.

Name List: Noccaea fendleri ssp. glauca

3236. Noccaea fendleri (A. Gray) Holub ssp. glauca (A. Nelson) Al-Shehbaz & M. Koch. Isolated hill in the Idaho Springs-Ralston shear zone, 540 m. northwest of the Coal Creek Canyon Fire Department Station 3, 14.4 km. north northwest of Golden. (39.8765,-105.2823,WGS 1984) North side of hill in Ponderosa pine woodland. 4/24/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: REGIS(141) )

Field Notes: Coll. No. 3237, 24 Apr 2024.

Name List: Cirsium vulgare

3237. Cirsium vulgare (Savi) Ten. Weed: CO DofA, List: B. Basal rosette. In cobbles and gravel of the bank of Coal Creek, 850 m. northwest of the Coal Creek Canyon Fire Department Station 3, 14.6 km. north northwest of Golden. (39.8778,-105.2856,WGS 1984) iNaturalist: 209169508. 4/24/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (JCOS )

Coll. No. 3237, Cirsium vulgare.

Coll. No. 3237, basal rosette of Cirsium vulgare.

Field Notes: Coll. No. 3238, 8 May 2024.

Name List: Xanthoceras sorbifolium

3238. Xanthoceras sorbifolium Bunge. Woody shrub, about 2 m. tall, rooted at the base of a telephone pole, between that pole and a fence post. West end of alley parallel to 4th and 5th Streets, between Arapahoe and Cheyenne Streets, north side of alley, rooted between telephone pole and fence post, nearest street address 407 Cheyenne Street, 940 m. northwest of the GNIS location of Golden. (39.7609,-105.2296,WGS 1984) Formerly grown in a private garden at 409 Cheyenne Street. Garden was destroyed by residential construction in 2018. However, this plant appeared in 2022 at the edge of the former garden some distance from the original location the plant was grown. 5/8/2024 Golden, Jefferson County, Colorado. (FLD )

Coll. No. 3238, Xanthoceras sorbifolium.

Field Notes: Coll. No. 3239, 14 May 2024.

Name List: Physaria vitulifera

3239. Physaria vitulifera Rydb. Bull. Torrey Bot. Club 28: 278. 1901. East-facing slope below a flat. Unclear whether we are in Niobrara Fm. or on the Pierre Shale. 815 m. west of Hildebrand Ranch Park parking lot, 2.10 km. south southwest of West Metro Fire Rescue Station 14 (39.5516,-105.1196,WGS 1984) Fine-grained calcareous sandstone with Musineon divaricatum, Helianthis pumilis, Delphinium sp., and Cercocarpus montanus. These collections were made because of previous collections on nearby private land that are determined P. bellii (COLO201392, COLO201400). 5/14/2024 Hildebrand Ranch Park, Jefferson County, Colorado. (d: COLO(136) , d: REGIS(141) , FLD , JCOS )

Physaria sp. On Pierre shale.

Coll. No. 3239, Physaria vitulifera.

Field Notes: Coll. No. 3240, 14 May 2024.

Name List: Physaria vitulifera

3240. Physaria vitulifera Rydb. Bull. Torrey Bot. Club 28: 278. 1901. Top of an east-facing slope below flat. Unclear whether we are in Niobrara Fm. or on the Pierre Shale. 835 m. west of Hildebrand Ranch Park parking lot, 2.10 km. south southwest of West Metro Fire Rescue Station 14. (39.5515,-105.1198,WGS 1984) Fine-grained calcareous sandstone with Musineon divaricatum, Helianthis pumilis, Delphinium sp., and Cercocarpus montanus. These collections were made because of previous collections on nearby private land that are determined P. bellii (COLO201392, COLO201400). 5/14/2024 Hildebrand Ranch Park, Jefferson County, Colorado. (d: COLO(136) , KHD )

Coll. No. 3240, Physaria vitulifera.

Field Notes: Coll. No. 3241, 14 May 2024.

Name List: Physaria vitulifera

3241. Physaria vitulifera Rydb. Bull. Torrey Bot. Club 28: 278. 1901. Just on the east slope of a small hogback mapped as Niobrara Fm., 965 m. west of Hildebrand Ranch Park parking lot, 2.15 km. south southwest of West Metro Fire Rescue Station 14. (39.5514,-105.1213,WGS 1984) Three of six plants growing under Cercocarpus montanus, with Eriogonum umbellatum and Opunita polyacantha. These collections were made because of previous collections on nearby private land that are determined P. bellii (COLO201392, COLO201400). 5/14/2024 Hildebrand Ranch Park, Jefferson County, Colorado. (d: OBI(132) , d: COLO(136) , KHD )

Coll. No. 3241, Physaria vitulifera.

Field Notes: Coll. No. 3242, 14 May 2024.

Name List: Oxytropis sericea var. sericea

3242. Oxytropis sericea Nutt. ex Torr. & A. Gray var. sericea. Lower northeast slope of small hogback, near where the Two Brands Trail crosses through the hogback, 914 m. west southwest of parking lot, 24.5 km. south southeast of Golden. (39.5490,-105.1203,WGS 1984) Also here: Juniperus scopulorum, Musineon divaricatum, Cercocarpus montanus, Castilleja integra, Gutierrezia sarothrae, and Leucocrinum montanum. 5/14/2024 Hildebrand Ranch Park, Jefferson County, Colorado. (d: KHD(131) , d: OBI(132) , d: CAS(135) , d: REGIS(141) , JCOS )

Coll. No. 3242, Oxytropis sericea var. sericea.

Comments: 11/6/2024, Coll. No. 3242, 14 May 2024: Perennial, to 35 cm., hairs soft, often wavy, not wart-like; Leaves, basal, compound, 170 mm. × 36 mm. wide; Leaflets, #17±, 29 mm. × 7 mm. wide, hairy both sides; Bracts, 11 mm., lanceolate; Calyx, tube 10 mm. + lobes 4 mm., hairs white, wavy; Flowers, ascending, 20-24 mm., banner, 19 mm., white with purple guides, wings, 19 mm. (unable to see distinctive flexure of wings in dried specimens), keel, 17 mm., purple distally, trip porrect; Fruit, last year's persistent, 20 mm. × 7 mm. wide, ascending;

Field Notes: Coll. No. 3243, 14 May 2024.

Name List: Ipomopsis spicata

3243. Ipomopsis spicata (Nutt.) V.E. Grant. Lower northeast slope of small hogback, near where the Two Brands Trail crosses through the hogback, 914 m. west southwest of parking lot, 24.5 km. south southeast of Golden. (39.5490,-105.1202,WGS 1984) Also here: Euphorbia brachyceras, Cirsium undulatum, Bromus inermis, and Leucocrinum montanum. 5/14/2024 Hildebrand Ranch Park, Jefferson County, Colorado. (JCOSs.n. , KHD83531^‡ )

Coll. No. 3243, Ipomopsis spicata.

Field Notes: Coll. No. 3243.1, 14 May 2024.

Name List: Euphorbia brachycera

3243.1 Euphorbia brachycera Engelm. Lower northeast slope of small hogback, near where the Two Brands Trail crosses through the hogback, 914 m. west southwest of parking lot, 24.5 km. south southeast of Golden. (39.5490,-105.1202,WGS 1984) Also here: Ipomopsis spicata, Cirsium undulatum, Bromus inermis, and Leucocrinum montanum. 5/14/2024 Hildebrand Ranch Park, Jefferson County, Colorado. (JCOSs.n. , UCR )

Coll. No. 3243.1, Euphorbia brachycera.

Field Notes: Coll. No. 3244, 14 May 2024.

Name List: Packera plattensis

3244. Packera plattensis (Nuttall) W. A. Weber & �. L�ve. Lower northeast slope of small hogback, near where the Two Brands Trail crosses through the hogback, 875 m. west southwest of parking lot, 24.5 km. south southeast of Golden. (39.5494,-105.1199,WGS 1984) Small groups of 2-4 plants scattered across the lowest slope of the hogback. 5/17/2024 Hildebrand Ranch Park, Jefferson County, Colorado. (UCR )

Coll. No. 3244, Packera plattensis.

Field Notes: Coll. No. 3245, 31 May 2024.

Name List: Populus deltoides ssp. monilifera

3245. Populus deltoides Marshall ssp. monilifera (Aiton) Eckenw. Pistillate catkins with developing fruit. East side of Highway 6, along the Illinois Street Trail, 2.21 km. south of the GNIS location of Golden. (39.7362,-105.2149,WGS84) Also collected here: Apocynum ×floribundum, Mirabilis nyctaginea, Rhamnus cathartica, and Schoenoplectus tabermontani. 5/31/2024 Deadman Gulch, Jefferson County, Colorado. (JCOSs.n. , REGISs.n. )

Coll. No. 3245, Populus deltoides var. monilifera.

Field Notes: Coll. No. 3246, 8 Jun 2024. Glossary: gibbous.

Name List: Lupinus argenteus var. argenteus

3246. Lupinus argenteus Pursh var. argenteus. Very small (1.67 ac.) City of Golden-owned open space, adjacent to Jefferson County Open Space (Apex Park) and Stonebridge HOA common area, accessed by narrow passage from Crawford Street, 3.44 km. south of the GNIS location of Golden. (39.7257,-105.2157,WGS 1984) Dry (-ish) northeast-facing slope. Also here: Artemisia ludoviciana, Helianthus pumilis, Heterotheca villosa, Linaria dalmatica, Eriogonum umbellatum, Rosa arkansana, and Koeleria macrantha. High mixed-grass prairie at base of Rocky Mountain Front Range. 6/8/2024 Tripp Ranch Meadow, Jefferson County, Colorado. (d: CS(138) , d: EIU(140) , UCR , x-CDA )

Coll. No. 3246, Lupinus argenteus var. argenteus.

Coll. No. 3246, Lupinus argenteus var. argenteus, showing gibbous calyx tube.

Comments: 11/7/2024,

Coll. No. 3246, 8 June 2024, characters observed: Perennial, of dry mixed-grass prairie, to 60 cm., caulescent, hairy but not densely villous; Leaves, cauline, palmate; Leaflets, #9, lance-linear, 56 mm. × 7 mm. wide, many folded, more hairy adaxial, less hairy abaxial; Calyx, tube 2.5 mm. + lobes 3 mm., tube gibbous; Corolla, 8 mm., closed appearance, blue, banner, recurved 3 mm. below apex, back glabrous, eyespot pale.

Field Notes: Coll. No. 3247, 8 Jun 2024.

Name List: Physocarpus monogynus

3247. Physocarpus monogynus (Torr.) J.M. Coult. Flowers quite pink compared to others seen around Golden s.l. Very small (1.67 ac.) City of Golden-owned open space, adjacent to Jefferson County Open Space (Apex Park) and Stonebridge HOA common area, accessed by narrow passage from Crawford Street, 3.44 km. south of the GNIS location of Golden. (39.7248,-105.2165,WGS 1984) On ridge near top of and entrance to parcel. Also here: Artemisia frigida, Artemisia ludoviciana, Grindelia squarrosa, Senecio integerrimus, Opuntia macrorhiza, O. polyacantha, Eriogonum umbellatum, Cercocarpus montanus, and Potentilla fissa High mixed-grass prairie at base of Rocky Mountain Front Range. 6/8/2024 Tripp Ranch Meadow, Jefferson County, Colorado. (d: REGIS(141) , EIU , FLD )

Coll. No. 3247, Physocarpus monogynus.

Field Notes: Coll. No. 3248, 10 Jun 2024.

Name List: Ligusticum porteri

3248. Ligusticum porteri J.M. Coult. & Rose. Beside dry streambed composed mostly of cobbles, 180 m. west southwest of the Coal Creek Canyon Fire Station 3, 13.9 km. northwest of Golden. (39.8726,-105.2796,WGS 1984) Also here: Cynoglossum officinale, Silene latifolia, Lupinus argentea, and Prunus virginiana. 6/10/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: KHD(131) , JCOS )

Coll. No. 3248, Ligusticum porteri.

Field Notes: Coll. No. 3249, 10 Jun 2024.

Name List: Physocarpus monogynus

3249. Physocarpus monogynus (Torr.) J.M. Coult. South side of gulch that drains by Coal Creek Canyon Fire Station No. 3, 567 m. southwest of the fire station, 14.0 km. northwest of Golden. (39.8721,-105.2841,WGS 1984) Open Douglas fir forest, with Cynoglossum officinale, Mertensia lanceolata, Veronica biloba, Androsace occidentalis, and Rubus deliciosus. 6/10/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: EIU(140) , d: OBI(132) , JCOS )

Field Notes: Coll. No. 3250, 10 Jun 2024.

Name List: Carex rossii

3250. Carex rossii Boott. On a terrace, right bank of the second creek on the south side of Coal Creek Canyon, the first being that of Blue Mountain Estates, 565 m. west southwest of Coal Creek Canyon Fire Department Station 3. (39.8721,-105.2841,WGS 1984) Open Douglas fir forest with little understory, and that of Physocarpus monogynus, with a large patch of a Veronica, c.f. V. biloba. Smut-infected(?). 6/10/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (FLD , KHD )

Coll. No. 3250, Carex rossii.

Inflorescence of Coll. No. 3250, Carex rossii.

Comments: 6/18/2024, Coll. No. 3250, 10 June 2024, characters observed: Perennial sedge, cespitose, to 30 cm.; Leaves, 0.7 mm. wide, green, sheaths margins white-hyaline; Inflorescence, 30 mm. × 5 mm. wide, 3-5 spikes; Spikes, basal present, terminal staminate, lateral, pistillate, 2-4; Bracts, proximal 20 mm., ±= inflorescence, leaf-like; Pistillate scales, 3 mm., >perigynia, green mid-vein, brown laterally, hyaline margin, awn 0; Perigynia, 2-4 per pistillate spike, 2.7 mm. × 1.7 mm. wide, wingless, pubescent, beak 0.7-1.3 mm., bi-dentate; Achene, spherical, 1.5 mm. × 1.5 mm. wide, black, smut-infested?; Stigma, #3; Anthers, not seen. , 2/8/2025, Seven vouchers indicated, but not sure where they went.

Field Notes: Coll. No. 3251, 10 Jun 2024.

Name List: Maianthemum racemosum ssp. amplexicaule

3251. Maianthemum racemosum (L.) Link ssp. amplexicaule (Nutt.) LaFrankie. On a terrace, right bank of the second creek on the south side of Coal Creek Canyon, the first being that of Blue Mountain Estates, 725 m. west southwest of Coal Creek Canyon Fire Department Station 3, 14.0 km. northwest of Golden. (39.8717,-105.2859,WGS 1984) Open Douglas fir forest (little to no middlestory) with Physocarpus montanus and Prunus virginiana. 6/10/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: COLO(136) , JCOS )

Field Notes: Coll. No. 3252, 10 Jun 2024.

Name List: Arnica cordifolia

3252. Arnica cordifolia Hook. On a terrace, right bank of the second creek on the south side of Coal Creek Canyon, the first being that of Blue Mountain Estates, 787 m. west southwest of Coal Creek Canyon Fire Department Station 3, 14.0 km. northwest of Golden. (39.8714,-105.2866,WGS 1984) Open Douglas fir forest, with Acer glabrum. 6/10/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: REGIS(141) , d: COLO(136) , d: CS(138) , JCOS )

Flower head of Coll. No. 3252, Arnica cordifolia.

Coll. No. 3252, Arnica cordifolia.

Comments: 11/10/2024, Coll. No. 3252, 10 June 2024, characters observed: Perennial, to 40 cm., rhizomes long and thin; Stem, simple (of 4 plants one was branched at base), arachnoid hairy; Leaves, opposite, 1-2 pairs, 64 mm. × 42 mm. wide, cordate, margin dentate (to almost serrate); Inflorescence, heads solitary; Receptacle, epaleate; Phyllaries, 1st series, 21 mm. × 3 mm. wide, green, margin chartaceous, pilose, 2nd series, very thin chartaceous; Ray flowers, fertile, #11, yellow, tube 6.5 mm. + blade 25 mm. × 9.5 mm. wide; Disc flowers, many, yellow, tube 10 mm. + lobes 1 mm.; Pappus, many, 9 mm., white, capillary; Cypsela, 6 mm., dark gray, strigose.

Field Notes: Coll. No. 3253, 10 Jun 2024.

Name List: Aletes acaulis

3253. Aletes acaulis (Torr.) J.M. Coult. & Rose. On a terrace, right bank of the second creek on the south side of Coal Creek Canyon, the first being that of Blue Mountain Estates, 936 m. west southwest of Coal Creek Canyon Fire Department Station 3, 14.0 km. northwest of Golden. (39.8708,-105.2882,WGS 1984) Rocky forest floor, on lower part of an rock outcrop prominent in aerial imagery. 6/10/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: REGIS(141) , d: EIU(140) , FLD , JCOS )

Field Notes: Coll. No. 3254, 10 Jun 2024.

Name List: Erysimum capitatum

3254. Erysimum capitatum (Hook.) Greene. Petals 29 mm., orange, fruit ascending. Nose of ridge, 483 m. west southwest of Coal Creek Canyon Fire Station 33, 14.0 km. north northwest of Golden. (39.8719,-105.2830,WGS 1984) Open woodland with Pinus ponderosa, Cercocarpus montanus, and Potentilla fissa. 6/10/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: EIU(140) , d: CAS(135) , FLD , JCOS )

Field Notes: Coll. No. 3255, 14 Jun 2024.

Name List: Koeleria macrantha

3255. Koeleria macrantha (Ledeb.) Schult. In a small pass between Elk Creek and Guy Gulch, 870 m. southeast of the Ralph Schell Trailhead, 10.1 km. west northwest of Golden. (39.7680,-105.3379,WGS 1984) Montane grassland, with: Erigeron divergens, Echinocereus viridiflorus, and Oxytropis lambertii. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (FLD , JCOSs.n. , OBI^‡ , UCR248686^‡ )

Comments: 6/14/2024, See list of observation at this point for associated plants.

Field Notes: Coll. No. 3256, 14 Jun 2024.

Name List: Penstemon secundiflorus

3256. Penstemon secundiflorus Benth. In a small pass between Elk Creek and Guy Gulch, 870 m. southeast of the Ralph Schell Trailhead, 10.1 km. west northwest of Golden. (39.7680,-105.3379,WGS 1984) Montane grassland, with: Artemisia frigida, Helianthus pumilis, and Heterotheca villosa. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (d: OBI(132) , d: EIU(140) , JCOS )

Coll. No. 3526, Penstemon secundiflorus.

Comments: 6/14/2024, See observations at this location for list of associated plants.

Field Notes: Coll. No. 3257, 14 Jun 2024.

Name List: Oxytropis lambertii

3257. Oxytropis lambertii Pursh. In a small pass between Elk Creek and Guy Gulch, 870 m. southeast of the Ralph Schell Trailhead, 10.1 km. west northwest of Golden. (39.7680,-105.3379,WGS 1984) Montane grassland, with: Erigeron divergens, Echinocereus viridiflorus, and Koeleria macrantha. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (d: CAS(135) , d: COLO(136) , d: CS(138) , JCOS )

Field Notes: Coll. No. 3258, 14 Jun 2024.

Name List: Castilleja integra

3258. Castilleja integra A. Gray. In a small pass between Elk Creek and Guy Gulch, 860 m. southeast of the Ralph Schell Trailhead, 10.1 km. west northwest of Golden. (39.7681,-105.3379,WGS 1984) Montane grassland, also nearby: Harbouria trachypleura, Heterotheca villosa, Alyssum simplex, and Eriogonum arcuatum. About 15 m. upslope from the other collections at this site. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (JCOSs.n. , OBI^‡ )

Field Notes: Coll. No. 3259, 14 Jun 2024.

Name List: Sedum lanceolatum

3259. Sedum lanceolatum Torr. Western slope of unnamed hill between Elk Creek and Guy Gulch, 880 m. southeast of Ralph Schell Trailhead, 10.6 km. west northwest of Golden. (39.7668,-105.3387,WGS 1984) Also seen here: Harbouria trachypleura, Pediocactus simpsonii, Astragalus laxmannii robustior, Eriogonum arcuatum, Cercocarpus montanus, and Potentilla fissa. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (d: OBI(132) , d: REGIS(141) , JCOS )

Field Notes: Coll. No. 3260, 14 Jun 2024.

Name List: Eriogonum umbellatum var. umbellatum

3260. Eriogonum umbellatum Torr. var. umbellatum. Slope above right bank of Elk Creek, near junction of Travois Trail and Evening Sun Loop, 760 m. southeast of the Ralph Schell Trailhead, 10.3 km. west northwest of Golden. (39.7675,-105.3398,WGS 1984) Grassy east-facing slope above creek, with: Artemisia dracunculus, Artemisia frigida, Helianthus pumilus, and Bromus inermis. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (d: OBI(132) , d: UCR(133) , FLD , JCOS )

Field Notes: Coll. No. 3261, 14 Jun 2024.

Name List: Astragalus laxmannii var. robustior

3261. Astragalus laxmannii Jacq. var. robustior (Hook.) Barneby & S. L. Welsh. South-facing slope above tributary of Elk Creek, between Elk Range Trail and Evening Sun Loop, 698 m. southeast of the Ralph Schell Trailhead, 10.3 km. west northwest of Golden. (39.7677,-105.3406,WGS 1984) Montane grassland, with: Rhus trilobata, Heterotheca villosa, Astragalus flexuosus, Eriogonum arcuatum, and Hesperostipa comata. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (d: KHD(131) , d: REGIS(141) , JCOS )

Field Notes: Coll. No. 3262, 14 Jun 2024.

Name List: Orobanche fasciculata

3262. Orobanche fasciculata Nutt. South-facing slope above tributary of Elk Creek, between Elk Range Trail and Evening Sun Loop, 680 m. southeast of the Ralph Schell Trailhead, 10.3 km. west northwest of Golden. (39.7680,-105.3406,WGS 1984) Montane grassland, with: Artemisia frigida, Helianthus pumilus, Heterotheca villosa Eriogonum umbellatum, and Carex inops heliophila. Numerous plants seen here, 15±. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (d: UCR(133) , JCOS )

Field Notes: Coll. No. 3263, 14 Jun 2024.

Name List: Packera fendleri

3263. Packera fendleri (A. Gray) W.A. Weber & �. L�ve. South-facing slope above tributary of Elk Creek, between Elk Range Trail and Evening Sun Loop, 658 m. southeast of the Ralph Schell Trailhead, 10.3 km. west northwest of Golden. (39.7682,-105.3407,WGS 1984) Montane grassland, with: Helianthus pumilis, Erysimum capitatum, Linum lewisii, and Erigonum alatum. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (d: EIU(140) , d: UCR(133) , FLD , JCOS )

Field Notes: Coll. No. 3264, 14 Jun 2024.

Name List: Eremogone fendleri

3264. Eremogone fendleri (A. Gray) Ikonnikov. South-facing slope above tributary of Elk Creek, between Elk Range Trail and Evening Sun Loop, 533 m. southeast of the Ralph Schell Trailhead, 10.5 km. west northwest of Golden. (39.7685,-105.3421,WGS 1984) Rocky ridge, soil covered with mosses. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (d: UCR(133) , d: KHD(131) , d: OBI(132) , JCOS )

Field Notes: Coll. No. 3265, 14 Jun 2024.

Name List: Crepis occidentalis ssp. costata

3265. Crepis occidentalis Nutt. ssp. costata (A. Gray) Babcock & Stebbins. South-facing slope above tributary of Elk Creek, between Elk Range Trail and Evening Sun Loop, 403 m. southeast of the Ralph Schell Trailhead, 10.6 km. west northwest of Golden. (39.7697,-105.3429,WGS 1984) Montane grassland. 6/14/2024 Centennial Cone Park, Jefferson County, Colorado. (JCOSs.n. , KHD83535^‡ , OBI^‡ , UCR248689^‡ )

Coll. No. 3265, Crepis occidentalis ssp. costata.

Field Notes: Coll. No. 3266, 21 Jun 2024.

Name List: Galium boreale

3266. Galium boreale L. Edge of forest opening, 75 m. southwest of Coal Creek, 1.52 km. west northwest of Fire Station 3, 15.0 km. north northwest of Golden. (39.8782,-105.2942,WGS 1984) Open woodland with Pinus ponderosa, Pseudotsuga menziesii, Apocynum sp., Artemisia sp., Berberis repens, and Geranium cespitosum. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: CS(138) , d: EIU(140) , FLD , JCOSs.n. )

Habitat of Coll. No. 3266, Galium boreale in Coal Creek Canyon.

Field Notes: Coll. No. 3267, 21 Jun 2024.

Name List: Berberis repens

3267. Berberis repens Lindl. In fruit, green when collected, fading to a dark brown. Edge of forest opening, 75 m. southwest of Coal Creek, 1.52 km. west northwest of Fire Station 3, 15.0 km. north northwest of Golden. (39.8782,-105.2941,WGS 1984) 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: CS(138) , JCOS )

Field Notes: Coll. No. 3268, 21 Jun 2024.

Name List: Apocynum �floribundum

3268. Apocynum �floribundum Greene. Leaves spreading to descending. Various ratios of calyx tube and lobes to corolla tube and lobes in 1.75 to 2.167 range. Corolla lobes spreading. Edge of forest opening, 75 m. southwest of Coal Creek, 1.52 km. west northwest of Fire Station 3, 15.0 km. north northwest of Golden. (39.8782,-105.2941,WGS 1984) 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: COLO(136) , d: CS(138) , d: EIU(140) , JCOS )

Comments: 11/19/2024, Coll. No. 3268, 21 June 2024, characters observed: Leaves, spreading to slightly descending; Calyx, tube 1 mm. + lobes 2 mm. = 3 mm.; Corolla, tube 3.5-4 mm. + lobes 2.5 mm. = 6.0-6.5 mm., lobes spreading; Ratio: calyx 3 mm.:corolla 6.5 mm. = 2.167× is inconclusive per Ackerfield (2022), Weber&Wittmann (2012), and Welch, et al. (1993); Ratio: corolla tube 3.5-4 mm.:calyx lobe 2 mm. = 1.75-2× suggests A. ×floribundum per FNA.

Field Notes: Coll. No. 3269, 21 Jun 2024.

Name List: Ligusticum porteri

3269. Ligusticum porteri J.M. Coult. & Rose. Second primary drainage of Lacey parcel, about 110 m. southwest of Coal Creek, 1.54 km. west northwest of Coal Creek Canyon Fire Station #3, 15.0 km. northwest of Golden. (39.8780,-105.2945,WGS 1984) Sunny openings in ponderosa pine and Douglas fir forest. Also here: Acer glabrum, Prunus virginiana, Geranium caespitosum, and Amelanchier alnifolia. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: CAS(135)^‡ , d: UCR(133)^‡ , FLD , JCOS )

Coll. No. 3269, Ligusticum porteri.

Coll. No. 3269, Ligusticum porteri, with frilled conic stylopodium.

Field Notes: Coll. No. 3270, 21 Jun 2024.

Name List: Lithospermum multiflorum

3270. Lithospermum multiflorum Torrey ex A. Gray. Second primary drainage of Lacey parcel, about 250 m. southwest of Coal Creek, 1.64 km. west northwest of Coal Creek Canyon Fire Station #3, 15.0 km. northwest of Golden. (39.8775,-105.2960,WGS 1984) Small opening in forest, with Pinus ponderosa, Acer glabrum, Amelanchier alnifolia, and Geranium caespitosum. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (COLO , JCOSs.n. , REGISs.n. , UCR248690^‡ )

Lithospermum multiflorum in Coal Creek Canyon Study Area.

Field Notes: Coll. No. 3271, 21 Jun 2024.

Name List: Carex occidentalis

3271. Carex occidentalis L. H. Bailey. Second primary drainage of Lacey parcel, about 240 m. southwest of Coal Creek, 1.62 km. west northwest of Coal Creek Canyon Fire Station #3, 15.0 km. northwest of Golden. (39.8775,-105.2957,WGS 1984) Under forest canopy, with Pseutotsuga menziesii, and Acer glabrum. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: KHD(131) , JCOS )

Field Notes: Coll. No. 3272, 21 Jun 2024.

Name List: Poa interior

3272. Poa interior Rydb. Bull. Torrey Bot. Club 32:604 (1905). Second primary drainage of Lacey parcel, about 280 m. southwest of Coal Creek, 1.67 km. west northwest of Coal Creek Canyon Fire Station #3, 15.0 km. northwest of Golden. (39.8772,-105.2964,WGS 1984) Douglas fir forest, also here: Physocarpus montanus, Viola canadensis, and Maianthemum racemosum ssp. amplexicaule. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: KHD(131) , d: OBI(132) , JCOS )

Coll. No. 3272, Poa interior.

Field Notes: Coll. No. 3273, 21 Jun 2024.

Name List: Lithospermum occidentale

3273. Lithospermum occidentale (Mack.) Weakley, Witsell & D. Estes. Second primary drainage of Lacey parcel, about 220 m. southwest of Coal Creek, 1.65 km. west northwest of Coal Creek Canyon Fire Station #3, 15.0 km. northwest of Golden. (39.8779,-105.2960,WGS 1984) Sunny southeast-facing grassland, with Artemisia dracunculus, Heterotheca villosa, Opuntia polyacantha, Castilleja integra, and Rosa arkansana. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: UCR(133) , d: CS(138) , d: COLO(136) , JCOS )

Field Notes: Coll. No. 3274, 21 Jun 2024.

Name List: Heuchera parvifolia

3274. Heuchera parvifolia Nutt. ex Torr. & A. Gray. Second primary drainage of Lacey parcel, about 285 m. southwest of Coal Creek, 1.64 km. west northwest of Coal Creek Canyon Fire Station #3, 15.0 km. northwest of Golden. (39.8776,-105.2960,WGS 1984) Bank of creek, with Pinus ponderosa, Osmorhiza depauperata, Hydrophyllum fendleri, and Acer glabrum. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (JCOSs.n. , UCR309615^‡ )

Coll. No. 3274, Heuchera parvifolia.

Field Notes: Coll. No. 3275, 21 Jun 2024.

Name List: Erythranthe floribunda

3275. Erythranthe floribunda (Douglas ex Lindl.) G. L. Nesom. Second primary drainage of Lacey parcel, about 160 m. southwest of Coal Creek, 1.60 km. west northwest of Coal Creek Canyon Fire Station #3, 15.0 km. northwest of Golden. (39.8779,-105.2953,WGS 1984) Growing with bryophytes in rocky streambed with a trickle of water. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (JCOSs.n. , KHD )

Field Notes: Coll. No. 3275.1, 21 Jun 2024.

Name List: Gratiola neglecta

3275.1 Gratiola neglecta Torr. Second primary drainage of Lacey parcel, about 160 m. southwest of Coal Creek, 1.60 km. west northwest of Coal Creek Canyon Fire Station #3, 15.0 km. northwest of Golden. (39.8779,-105.2953,WGS 1984) Growing with bryophytes and Erythranthe floribunda in rocky streambed with a trickle of water. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (JCOSs.n. )

Field Notes: Coll. No. 3276, 21 Jun 2024.

Name List: Lupinus argenteus var. rubricaulis

3276. Lupinus argenteus Pursh var. rubricaulis (Greene) S.L. Welsh. Tall, lacking basal leaves, petals mostly white, blue-tinged wings. Opening in forest on right bank of creek, 105 m. southwest of Coal Creek,1.55 km. west northwest of Coal Creek Fire Station #3, 15.0 km. north northwest of Golden. (39.8780,-105.2946,WGS 1984) 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: KHD(131) , d: OBI(132) , d: UCR(133) , JCOS )

Coll. No. 3276, Lupinus argenteus var. rubricaulis.

Field Notes: Coll. No. 3277, 21 Jun 2024.

Name List: Hackelia floribunda

3277. Hackelia floribunda (Lehm.) I. M. Johnst. Terrace about 80 m. south of Coal Creek, 1.49 km. west northwest of Coal Creek Fire Station #3, 15.0 km. north northwest of Golden. (39.8780,-105.2940,WGS 1984) Openings in mixed Douglas fir and ponderosa pine forest with Apocynum sp., Rubus deliciosus, and Thalictrum fendleri. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: KHD(131) , d: EIU(140) , d: REGIS(141) , JCOS )

Field Notes: Coll. No. 3278, 21 Jun 2024.

Name List: Potentilla hippiana � pulcherrima

3278. Potentilla hippiana � pulcherrima. Forest glade on right bank of Coal Creek, 1.37 km. west northwest of Coal Creek Fire Station #3, 14.9 km. north northwest of Golden. (39.8779,-105.2925,WGS 1984) Forest glade in openings between Pinus ponderosa, with Eriogonum umbellatum, Clematis hirsuta, and Bromus inermis. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: EIU(140) , d: COLO(136) , d: CS(138) , JCOS )

Coll. No. 3278, Potentilla hippiana � pulcherrima.

Basal leaf of Coll. No. 3278, Potentilla hippiana � pulcherrima.

Field Notes: Coll. No. 3279, 21 Jun 2024.

Name List: Lupinus argenteus var. argenteus

3279. Lupinus argenteus Pursh var. argenteus. North side of Coal Creek, south-facing bank between Colorado State Highway 72 “Coal Creek Canyon Road” and the creek, 1.42 km. northwest of Coal Creek Fire Station #3, 1.50 km. north northwest of Golden. (39.8792,-105.2923,WGS 1984) Disturbed grassland in openings between Pinus ponderosa, with Eriogonum umbellatum, Clematis hirsuta, and Bromus inermis. 6/21/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: COLO(136) , d: CAS(135) , d: UCR(133) , JCOS )

Field Notes: Coll. No. 3280, 26 Jun 2024.

Name List: Erythranthe floribunda

3280. Erythranthe floribunda (Douglas ex Lindl.) G. L. Nesom. Calyx inflated in fruit, teeth nearly equal; Corolla yellow. Southeast corner of Mount Galbraith Park, 2.17 km. west northwest of the GNIS location of Golden. (39.7588,-105.2461,WGS 1984) Small cascade over bedrock, with mosses, Dodecatheon pulchelllum, Potentilla norvegica, Heuchera parvifolia, and Eleocharis sp. 6/26/2024 Magpie Gulch, Jefferson County, Colorado. (JCOS , OBI^‡ )

Coll. No. 3280, 26 June 2024.

Field Notes: Coll. No. 3281, 26 Jun 2024.

Name List: Eleocharis quinqueflora

3281. Eleocharis quinqueflora (Hartmann) O. Schwarz. Southeast corner of Mount Galbraith Park, 2.17 km. west northwest of the GNIS location of Golden. (39.7588,-105.2461,WGS 1984) Small cascade over bedrock, with mosses, Erythranthe floribunda, Dodecatheon pulchelllum, Potentilla norvegica, and Heuchera parvifolia. 6/26/2024 Magpie Gulch, Jefferson County, Colorado. (KHD )

Field Notes: Coll. No. 3282, 26 Jun 2024. Coll. No. 3282.1, 26 Jun 2024.

Name List: Potentilla norvegica

3282. Potentilla norvegica L. Southeast corner of Mount Galbraith Park, about 690 m. west of Canyon Point Circle, 2.17 km. west northwest of the GNIS location of Golden. (39.7589,-105.2461,WGS 1984) Near a small cascade over bedrock, drying mud and grasses away from creek, with Erythranthe floribunda, Dodecatheon pulchellum, Eleocharis sp., and Poa pratensis. 6/26/2024 Magpie Gulch, Jefferson County, Colorado. (COLO )

Coll. No. 3282, Potentilla norvegica.

Name List: Juncus bufonius

3282.1 Juncus bufonius L. Southeast corner of Mount Galbraith Park, about 690 m. west of Canyon Point Circle, 2.17 km. west northwest of the GNIS location of Golden. (39.7589,-105.2461,WGS 1984) Near a small cascade over bedrock, drying mud and grasses away from creek, with Erythranthe floribunda, Dodecatheon pulchellum, Potentilla norvegica, Eleocharis sp., and Poa pratensis. 6/26/2024 Magpie Gulch, Jefferson County, Colorado. (d: COLO(136) )

Field Notes: Coll. No. 3283, 28 Jun 24.

Name List: Potentilla gracilis var. fastigiata

3283. Potentilla gracilis Hook. var. fastigiata (Nutt.) S. Watson. Uncommon. Average leaflet incision <½. Open field off of Plainview Road, 1.2 miles west on CO State Highway 72 "Coal Creek Canyon Road" from CO State Highway 93, 0.9 miles generally north on Plainview Road, then 130 m. generally west into field. (39.8858,-105.2636,WGS 1984) Open grassy field that is a little wetter than most, also here: Helianthus pauciflorus ssp. subrhomboideus, Sonchus asper, Opuntia fragilis (in nearby gravel bar), and Sisyrinchium montanum. 6/28/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (d: KHD(131) , JCOS )

Coll. No. 3283, Potentilla gracilis var. fastigiata.

Coll. No, 3283, Potentilla gracilis var. fastigiata.

Field Notes: Coll. No. 3284, 28 Jun 24.

Name List: Rumex triangulivalvis

3284. Rumex triangulivalvis (Danser) Rech. f. Inner tepals with a tubercle, margins entire; leaf margins flat. 1.7 miles west on CO Highway 72 from CO Highway 93, then 0.9 miles generally north on Plainview Road, then about 215 m. west to south side of a small dam across creek. (39.8864,-105.2643,WGS 1984) Also here: Gratiola neglecta, Persicaria pensylvanica, Alisma triviale, and Eleocharis palustris. 6/28/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (d: OBI(132) , d: UCR(133) , d: KHD(131) , JCOS )

Coll. No. 3284, Rumex triangulivalvis.

Field Notes: Coll. No. 3285, 28 Jun 24.

Name List: Cicuta maculata var. angustifolia

3285. Cicuta maculata L. var. angustifolia Hook. 1.7 miles west on CO Highway 72 from CO Highway 93, then 0.9 miles generally north on Plainview Road, then about 575 m. generally west along small creek. 15.1 km. north northwest of Golden. (39.8868,-105.2685,WGS 1984) Growing in creek, also nearby: Heliomeris multiflora, Mentha arvensis, Lysimachia ciliata, Ranunculus pensylvanicus, and Galium boreale. Infraspecific names are not accepted by current Colorado florae. 6/28/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (d: KHD(131) , JCOS , OBI^‡ , UCR309616^‡ )

Coll. No. 3285, Cicuta maculata var. angustifolia

Field Notes: Coll. No. 3286, 3 Jul 2024.

Name List: Tripleurospermum inodorum

3286. Tripleurospermum inodorum (L.) Sch.Bip. Left bank of Coal Creek, 1.31 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8784,-105.2914,WGS 1984) Streamside, in a veritable rogues' gallery of weeds: Cynoglossum officinale, Hypericum perforatum, Potentilla recta, Verbascum thapsus, and Dactylis glomerata. Colorado Noxious Weed List B. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: KHD(131) , d: OBI(132) , JCOS )

A Rogues' Gallery of weeds along Coal Creek.

Coll. No. 3286, Tripleurospermum inodorum

Comments: 12/4/2024, Coll. No. 3286, 3 July 2024, characters observed: Annual herb, to 60 cm.; Stem, glabrous; Leaves, cauline, petiole, 0 mm., blade, 50 mm. × 12 mm. wide, reduced distally, divided, 2× pinnate, lobes filiform; Inflorescence, in heads, not overlopped by leaves; Peduncles, 25-70 mm.; Involucre, 4 mm. × 11 mm. wide, glabrous, Phyllaries, in 3± equal series, 5.2 mm. × 1 mm. wide, tongue-shaped, strong central vein, mostly tan-brown, glabrous; Receptacle, epaleate; Flowers of 2 kinds; Rays, #20-24, tube 2 mm. + blade 9 mm. × 2.8 mm. wide, white, fertile; Disc flowers, many, tube 1.5 mm. +lobes 0.5 mm.; yellow, open; Pappus, scales, coroniform, 0.3 mm., ±equal; Cypsela, 1.2 mm., winged, blown, tuberculate(?).

Field Notes: Coll. No. 3286.1, 3 Jul 2024.

Name List: Hypericum perforatum

3286.1 Hypericum perforatum L. Weed: CO DofA, List: C. Left bank of Coal Creek, 1.31 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8784,-105.2914,WGS 1984) Streamside, in a veritable rogue's gallery of weeds: Tripleurospermum inodorum, Cynoglossum officinale, Potentilla recta, Verbascum thapsus, and Dactylis glomerata. Colorado Noxious Weed list C. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: OBI(132) , d: CS(138) , JCOS )

Field Notes: Coll. No. 3287, 3 Jul 2024.

Name List: Ranunculus acris

3287. Ranunculus acris L. Leaf segments broad, achene beak short. Right bank of Coal Creek, 1.31 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8783,-105.2914,WGS 1984) Creekside with dense willows and Rocky Mountain maple. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: COLO(136) , d: REGIS(141) , d: CS(138) , d: EIU(140) , JCOS )

Coll. No. 3287, Ranunculus acris.

Field Notes: Coll. No. 3288, 3 Jul 2024.

Name List: Epilobium ciliatum

3288. Epilobium ciliatum Raf. Bottom of a small watercourse, about 25 m. south of the right bank of Coal Creek, 1.30 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8781,-105.2914,WGS 1984) Broken shade in ponderosa pine and Douglas fir forest. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: CAS(135) , d: COLO(136) , FLD , JCOS )

Coll. No. 3288, Epilobium ciliatum.

Field Notes: Coll. No. 3289, 3 Jul 2024.

Name List: Leucanthemum vulgare

3289. Leucanthemum vulgare (Vaill.) Lam. Weed: CO DofA, List: B. Right bank of Coal Creek, 1.24 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8783,-105.2906,WGS 1984) Streamside sand bank. Colorado Noxious Weed List B. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (JCOS )

Comments: 12/6/2024, Coll. No. 3289 & 3290, 3 Jul 2024, characters observed: Perennial herb, to 75 cm., creeping rootstock; Stem, glabrous, proximally purple, distally green; Leaves, basal withered at anthesis, cauline, alternate, sessile, blade, 47-52 mm. × 15 mm. wide, reduced distally, spatulate, irregularly toothed, glabrous; Involucre, 4 mm. × 11 mm. wide, ±flat; Phyllaries, in 3± series, unequal, lower < upper; 7 mm. × 2 mm. wide, green with dark-brown scarious margins, eglandular, margins, flat; Receptacle, epaleate; Flowers of 2 kinds; Rays, #30±, tube 2 mm. + blade 12 mm. × 3.5 mm. wide, white; Disc flowers, many, tube 2 mm. + lobes 0.5 mm., yellow; Pappus, absent; Cypsela, 1.5 mm., glabrous, black with many (10?) tan ribs, dehiscing readily.

Field Notes: Coll. No. 3290, 3 Jul 2024.

Name List: Leucanthemum vulgare

3290. Leucanthemum vulgare (Vaill.) Lam. Weed: CO DofA, List: B. Right bank of Coal Creek, 1.20 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8783,-105.2901,WGS 1984) Dry ephemeral sandy stream channel. Colorado Noxious Weed List B. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: REGIS(141) , d: OBI(132) , FLD , KHD )

Coll. No. 3290, Leucanthemum vulgare.

Field Notes: Coll. No. 3291, 3 Jul 2024.

Name List: Corylus cornuta

3291. Corylus cornuta Marshall. Right bank of Coal Creek, 1.19 km. west northwest of Coal Creek Canyon Fire Station #3, 14.8 km. north northwest of Golden. (39.8782,-105.2900,WGS 1984) Dense vegetation of willows, ponderosa pine, and Douglas fir on the upper bank of Coal Creek. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: REGIS(141) , d: EIU(140) , d: CS(138) , JCOS )

Coll. No. 3291, Corylus cornuta.

Field Notes: Coll. No. 3292, 3 Jul 2024. Coll. No. 3293, 3 Jul 2024.

Name List: Thalictrum fendleri

3292. Thalictrum fendleri Engelm. ex A. Gray. Pistilate plants, in fruit. Terrace above right bank of Coal Creek, about 15 m south of the creek, 1.24 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8782,-105.2907,WGS 1984) Shaded edge of ponderosa pine woodland. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: COLO(136) , d: REGIS(141) , FLD , JCOS )

Coll. No. 3292, Thalictrum fendleri in fruit.

Coll. No. 3292, Thalictrum fendleri.

Inforescence of Coll. No. 3293, Carex sp.

Field Notes: Coll. No. 3293, 3 Jul 2024.

Name List: Carex stipata

3293. Carex stipata Muhl. ex Willd. Stem sharply 3-angled. Terrace above right bank of Coal Creek, about 45 m south of the creek, 1.29 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8780,-105.2914,WGS 1984) Bank of very small creek, also here: Lysimachia ciliata, Glyceria striata. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (JCOSs.n. , KHD83417^‡ )

Coll. No. 3293, Carex stipata.

Comments: 12/31/2024, Coll. No. 3293, 3 July 2024, characters observed: Perennial sedge, robust, 65 cm., ridges scabrous below head; Leaves, 6 mm. wide, green, sheaths, white hyaline, cross rugulose; Inflorescence, 40 mm. × 10 mm. wide, #15± spikes, clustered; Spikes, identical appearing, unable to determine whether androgynous or gynecandrous; Bracts, proximal, 10 mm., <inflorescence; Pistillate scales, <perigynia; Perigynia, many, 4 mm. × 1.5 mm. wide, flat adaxially, weakly winged, beak, 2 mm., sloping to tip, serrulate; Achene, 1.2 mm. × 1.3 mm. wide, biconvex, obovate; Stigmas, #2;

Field Notes: Coll. No. 3294, 3 Jul 2024.

Name List: Glyceria striata

3294. Glyceria striata (Lam.) Hitchc. Late collection, shattered badly. Terrace above right bank of Coal Creek, about 45 m south of the creek, 1.31 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8780,-105.2916,WGS 1984) Shade of mixed Douglas fir and ponderosa pine forest, with Lysimachia ciliata, and Carex sp. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: Discarded )

Field Notes: Coll. No. 3295, 3 Jul 2024.

Name List: Lysimachia ciliata

3295. Lysimachia ciliata L. Terrace above right bank of Coal Creek, about 30 m south of the creek, 1.31 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8781,-105.2916,WGS 1984) Forest glade in openings of Douglas fir and ponderosa pine, with: Epilobium ciliatum, Carex sp., and Glyceria striata. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: EIU(140) , d: REGIS(141) , FLD , JCOS )

Field Notes: Coll. No. 3296, 3 Jul 2024.

Name List: Erigeron speciosus

3296. Erigeron speciosus (Lindl.) DC. Terrace just above right bank of Coal Creek, 1.36 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8783,-105.2922,WGS 1984) Sunny spot among Pinus ponderosa, Prunus virginiana, and Populus angustifolia. 7/3/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: COLO(136) , d: REGIS(141) , d: UCR(133) , JCOS )

Inflorescence of Coll. No. 3296, Erigeron speciosus.

Field Notes: Coll. No. 3297, Orthilia secunda..

Name List: Orthilia secunda

3297. Orthilia secunda (L.) House. Terrace above Morrison Creek, just south of the Little Scraggy Trail, 1.61 km. west of Kelsey Campground, 50.8 km. south of Golden. (39.3072,-105.2845,WGS 1984) Damp forest floor, with decaying wood and bryophytes, also collected here: Osmorhiza depauperata, Pyrola chlorantha, Rubus pubescens, and Oryzopsis asperifolia. 7/12/2024 Morrison Creek, Jefferson County, Colorado. (d: OBI(132) , KHD )

Coll. No. 3297, Orthilia secunda.

Field Notes: Coll. No. 3298, 19 Jul 2024.

Name List: Nepeta cataria

3298. Nepeta cataria L. Terrace above and about 50 m. south of right bank of Coal Creek, 1.46 km. west northwest of Coal Creek Fire Station #3, 15.1 km. north northwest of Golden. (39.8783,-105.2934,WGS 1984) Broken shade with Symphyotrichum laeve, Symphoricarpos sp., Monarda fistulosa. Prunus virginiana, Rubus deliciosus. Populus angustifolia, Scrophularia lanceolata, and Acer glabrum. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: CS(138) , JCOS )

Field Notes: Coll. No. 3299, 19 Jul 2024.

Name List: Monarda fistulosa

3299. Monarda fistulosa L. Terrace above and about 50 m. south of right bank of Coal Creek, 1.46 km. west northwest of Coal Creek Fire Station #3, 15.1 km. north northwest of Golden. (39.8783,-105.2934,WGS 1984) Broken shade with Symphyotrichum laeve, Symphoricarpos sp., Nepetia cataria. Prunus virginiana, Rubus deliciosus. Populus angustifolia, Scrophularia lanceolata, and Acer glabrum. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: EIU(140) , FLD , JCOS )

Field Notes: Coll. No. 3300, 19 Jul 2024.

Name List: Cichorium intybus

3300. Cichorium intybus L. Large plants, >1 m. tall, petals fading to white from blue in hours. In the scoured-out creek channel (possibly from the 2013 flood) about 25 m. south of the current channel of Coal Creek, 1.50 km. west northwest of Coal Creek Fire Station #3, 15.0 km. north northwest of Golden. (39.8785,-105.2938,WGS 1984) 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (JCOS )

Comments: 12/11/2024, Use parchment or other non-stick paper when collecting.

Field Notes: Coll. No. 3301, 19 Jul 2024.

Name List: Oenothera villosa

3301. Oenothera villosa Thunb. On a bank of a scoured-out creek channel (possibly from the 2013 flood) about 25 m. south of the current channel of Coal Creek, 1.50 km. west northwest of Coal Creek Fire Station #3, 15.0 km. north northwest of Golden. (39.8785,-105.2938,WGS 1984) Ponderosa pine on top of the creek bank, also here: Arctium minus, Cichorium intybus, and Pericome caudata. Probably ssp. villosa if infaspecific names are to be applied. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: OBI(132) , d: COLO(136) , FLD , JCOS )

Coll. No. 3301, Oenothera villosa.

Comments: Originally determined O. elata, which species has a larger petal.

Field Notes: Coll. No. 3302, 19 Jul 2024.

Name List: Arctium minus

3302. Arctium minus Bernh. Weed: CO DofA, List: C. Scoured-out creek channel (possibly from the 2013 flood), in the mouth of tributary creek, about 25 m. south of the current channel of Coal Creek, 1.50 km. west northwest of Coal Creek Fire Station #3, 15.0 km. north northwest of Golden. (39.8785,-105.2939,WGS 1984) Ponderosa pine on top of the creek bank, also in the creek channel: Cichorium intybus, Pericome caudata, and Oenothera villosa. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: KHD(131) , JCOS )

Coll. No. 3302, Arctium minus.

Field Notes: Coll. No. 3303, 19 Jul 2024.

Name List: Actaea rubra

3303. Actaea rubra (Aiton) Willd. Terrace about 90 m. south of Coal Creek, 1.50 km. west northwest of Coal Creek Canyon Fire Station #3, 15.0 km. north northwest of Golden. (39.8779,-105.2941,WGS 1984) Shaded ponderosa pine and Douglas fir forest, with: Apocynum sp., Hackelia floribunda, Thalictrum fendleri, and Rubus deliciosus. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: OBI(132) , JCOS )

Coll. No. 3303, Actaea rubra.

Field Notes: Coll. No. 3304, 19 Jul 2024.

Name List: Erigeron speciosus

3304. Erigeron speciosus (Lindl.) DC. Leaves glabrous, ciliate. Gentle slope above creek terrace, 125 m. south of Coal Creek, 1.50 km. west northwest of Coal Creek Canyon Fire Station #3, 15.0 km. north northwest of Golden. (39.8776,-105.2942,WGS 1984) Openings in ponderosa pine and Douglas fir. Moist ground. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: EIU(140) , d: CS(138) , d: CAS(135) , x-CDA )

Coll. No. 3304, Erigeron speciosus.

Field Notes: Coll. No. 3305, 19 Jul 2024.

Name List: Castilleja rhexifolia

3305. Castilleja rhexifolia Rydb. Stem strigillose rather than canescent; flowers with a pinkish cast. Lower end of a north-facing meadow, on southeast-facing slope, 175 m. south of Coal Creek, 1.53 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8773,-105.2947,WGS 1984) Open meadow with Achillea millefolia, Artemisia dracunculus, A. ludoviciana, Heterotheca villosa, Symphyotrichum laeve, Monarda fistulosa, Potentilla fissa, and Carex inops var. heliophila. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: KHD(131) , JCOS )

Coll. No. 3305, Castilleja rhexifolia

Field Notes: Coll. No. 3306, 19 Jul 2024.

Name List: Achillea millefolium

3306. Achillea millefolium L. Lower end of a northeast-facing meadow, on southeast-facing slope, 185 m. south of Coal Creek, 1.53 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8773,-105.2946,WGS 1984) Open meadow with Achillea millefolia, Artemisia dracunculus, A. ludoviciana, Heterotheca villosa, Symphyotrichum laeve, Monarda fistulosa, Potentilla fissa, and Carex inops var. heliophila. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: UCR(133) , d: CAS(135) , d: EIU(140) , JCOS )

Field Notes: Coll. No. 3307, 19 Jul 2024.

Name List: Castilleja rhexifolia

3307. Castilleja rhexifolia Rydb. Lower end of a northeast-facing meadow, on southeast-facing slope, 225 m. south of Coal Creek, 1.53 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8769,-105.2948,WGS 1984) Sunny meadow with occasional trees and shrubs, with: Ligusticum porteri, Heterotheca villosa, Symphoricarpos occidentalis, and Prunus virginiana. Same as Coll. No. 3305. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: COLO(136) , UCR )

Coll. No. 3307, Castilleja integra.

Field Notes: Coll. No. 3308, 19 Jul 2024.

Name List: Symphoricarpos occidentalis

3308. Symphoricarpos occidentalis Hook. Middle to upper end of a northeast-facing meadow, on southeast-facing slope, 235 m. south of Coal Creek, 1.54 km. west northwest of Coal Creek Canyon Fire Station #3, 14.9 km. north northwest of Golden. (39.8769,-105.2950,WGS 1984) Open meadow, with Ligusticum porteri, Monarda fistulosa, Prunus virginiana, and Acer glabrum. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: OBI(132) , d: CAS(135) , d: REGIS(141) , JCOS )

Field Notes: Coll. No. 3309, 19 Jul 2024.

Name List: Elymus trachycaulus ssp. trachycaulus

3309. Elymus trachycaulus (Link) Gould ex Shinners ssp. trachycaulus. Somewhat glaucous, only a couple in bloom. Upper end of a northeast-facing meadow, on gentle southeast-facing slope, 345 m. south of Coal Creek, 1.52 km. west of Coal Creek Canyon Fire Station #3, 14.8 km. north northwest of Golden. (39.8758,-105.2951,WGS 1984) Top end of meadow below canyon slope, with: Geranium caespitosum, Prunus virginiana, Allium cernuum, and Nassella viridula. 7/19/2024 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (KHD )

Coll. No. 3309, Elymus trachycaulus ssp. trachycaulus

Comments: 12/15/2024, Coll. No. 3309, 19 July 2024, characters observed: Perennial grass, to 80 cm., clumped, rhizomes not seen; Leaves, sheath, 82 mm., open, ligule, membranous, 0.7 mm., blade, 150 mm. × 6.5 mm. wide, flat; Inflorescence, 1 per culm, >leaves, two-sided spike, 110 mm. × 9 mm. wide; Rachis, not extended, scabrous; Spikelets, many, flat side to rachis, 16.5 mm. × 2.6 mm. wide, similar, borne singly, sessile, overlap 6 mm. = 36%; Disarticulation, above the glumes, between florets; Glumes, lower (smaller), 10 mm. × 2 mm. wide, veins, #5, upper (larger), 11 mm. × 2.3 mm. wide, <lowest floret, veins, #5, rounded, tough, awns, #1, 1.0-1.2 mm., margins, hyaline; Florets, 6 per spikelet, bisexual; Lemma, 11 mm., >glumes, rolled, veins, #5, glabrous, awns, #1, 2 mm., straight, difficult to tease away from lemma and achene; Palea, 8 mm., <lemma; Achene, 5 mm., tan, fused to lemma. , 2/8/2025, Originally shown as KHD 132 rather than KHD 131.

Field Notes: Coll. No. 3310, 22 July 2024.

Name List: Rosa woodsii

3310. Rosa woodsii Lindl. Plant without prickles on new growth, (5)7 leaflets per leaf. Right bank of Salt Creek, just west of the place it is first crossed by FR 435 “Salt Creek Road,” 3.0 miles generally west of US Highway 285, 111 km. southwest of Golden. (38.9572,-106.0078,WGS 1984) In aspen at edge of what appears to be a former beaver pond, with Pseudocymopterus montanus, Ribes inerme, Dasiphora fruticosa, and Carex sp. 7/22/2024 Salt Creek, Park County, Colorado. (d: REGIS(141) , d: CS(138) , d: OBI(132) , KHD )

Field Notes: Coll. No. 3311, 22 July 2024.

Name List: Dasiphora fruticosa

3311. Dasiphora fruticosa (L.) Rydb. Right bank of Salt Creek, just west of the place it is first crossed by FR 435 “Salt Creek Road,” 3.0 miles generally west of US Highway 285, 111 km. southwest of Golden. (38.9574,-106.0079,WGS 1984) Edges of aspen grove, near what appears to be a former beaver pond, with Pseudocymopterus montanus, Ribes inerme, Rosa woodsii, and Carex sp. 7/22/2024 Salt Creek, Park County, Colorado. (d: CS(138) , d: OBI(132) , FLD , KHD )

Field Notes: Coll. No. 3312, 22 July 2024.

Name List: Ribes inerme

3312. Ribes inerme Rydb. Right bank of Salt Creek, just west of the place it is first crossed by FR 435 “Salt Creek Road,” 3.0 miles generally west of US Highway 285, 111 km. southwest of Golden. (38.9573,-106.0079,WGS 1984) Edges of aspen grove, near what appears to be a former beaver pond, with Pseudocymopterus montanus, Dasiphora fruticosa, Rosa woodsii, and Carex sp. 7/22/2024 Salt Creek, Park County, Colorado. (d: CAS(135) , d: CS(138) , d: REGIS(141) , x-CDA )

Coll. No. 3312, Ribes inerme.

Field Notes: Coll. No. 3313, 22 July 2024.

Name List: Cymopterus lemmonii

3313. Cymopterus lemmonii (J. M. Coult. & Rose) Dorn. Right bank of Salt Creek, just west of the place it is first crossed by FR 435 “Salt Creek Road,” 3.0 miles generally west of US Highway 285, 111 km. southwest of Golden. (38.9573,-106.0078,WGS 1984) Edges of aspen grove, near what appears to be a former beaver pond, with Ribes inerme, Dasiphora fruticosa, Rosa woodsii, and Carex sp. 7/22/2024 Salt Creek, Park County, Colorado. (d: COLO(136) , CAS141634^‡ , FLD , OBI^‡ )

Coll. No. 3313, Cymopterus lemmonii.

Field Notes: Coll. No. 3314, 22 July 2024.

Name List: Carex utriculata

3314. Carex utriculata Boott. Right bank of Salt Creek, just west of the place it is first crossed by FR 435 “Salt Creek Road,” 3.0 miles generally west of US Highway 285, 111 km. southwest of Golden. (38.9572,-106.0080,WGS 1984) Channels in meadow that looks to be a former beaver pond, with Campanula parryi. 7/22/2024 Salt Creek, Park County, Colorado. (d: OBI(132) , d: CS(138) , KHD )

Coll. No. 3314, Carex utriculata.

Comments: 12/18/2024, Coll. No. 3314, 22 July 2024, characters observed: Perennial, sedge, to 60 cm., rhizomatous; Leaves, with cross-walls, not pubescent, sheath, smooth; Inflorescence, 200 mm. × 9 mm. wide, 5-6 spikes; Spikes, differentiated, basal, absent, terminal, staminate, 26 mm. × 2.5 mm. wide, lateral, pistillate, erect, 30 mm. × 8 mm. wide, ±cylindric; Bracts, proximal, 280 mm., >inflorescence; Scales, pistillate, 3-3.5 mm., <perigynia; Perigynia, 3.5 mm., glabrous, yellowish, beak, distinct; Stigma, #3; Anthers, 2.3 mm.

Field Notes: Coll. No. 3315, 22 July 2024.

Name List: Campanula parryi

3315. Campanula parryi A. Gray. Right bank of Salt Creek, just west of the place it is first crossed by FR 435 “Salt Creek Road,” 3.0 miles generally west of US Highway 285, 111 km. southwest of Golden. (38.9572,-106.0081,WGS 1984) Shaded edge of former beaver pond now a meadow, with: Carex utriculata. 7/22/2024 Salt Creek, Park County, Colorado. (d: EIU(140) , d: REGIS(141) , x-CDA )

Field Notes: Coll. No. 3316, 22 July 2024.

Name List: Oxytropis deflexa var. sericea

3316. Oxytropis deflexa (Pall.) DC. var. sericea Torr. & A. Gray. Right bank of Salt Creek, just west of the place it is first crossed by FR 435 “Salt Creek Road,” 3.0 miles generally west of US Highway 285, 111 km. southwest of Golden. (38.9572,-106.0083,WGS 1984) Edge of aspen and spruce filling in meadow that appears to be a former beaver pond. 7/22/2024 Salt Creek, Park County, Colorado. (d: REGIS(141) , d: CS(138) , d: FLD(151) , d: OBI(132) , KHD )

Coll. No. 3316, Oxytropis deflexa var. sericea.

Inflorescences of Coll. No. 3316, Oxytropis deflexa var. sericea.

Field Notes: Coll. No. 3317, 22 July 2024.

Name List: Allium cernuum

3317. Allium cernuum Roth. Right bank of Salt Creek, just west of the place it is first crossed by FR 435 “Salt Creek Road,” 3.0 miles generally west of US Highway 285, 111 km. southwest of Golden. (38.9575,-106.0088,WGS 1984) Drier soil in the meadow with spruce, aspen, Cirsium arvense and Dasiphora fruticosa. 7/22/2024 Salt Creek, Park County, Colorado. (CAS1414589^‡ , CS , FLD , UCR248856^‡ )

Field Notes: Coll. No. 3318, 22 July 2024.

Name List: Primula pauciflora var. pauciflora

3318. Primula pauciflora (Durand) A. R. Mast & Reveal var. pauciflora. Right bank of Salt Creek, just west of the place it is first crossed by FR 435 “Salt Creek Road,” 3.0 miles generally west of US Highway 285, 111 km. southwest of Golden. (38.9567,-106.0087,WGS 1984) Floor of aspen and lodgepole forest. Coordinates estimated from other nearby collections. 7/22/2024 Salt Creek, Park County, Colorado. (CS )

Colorado, Pike-San Isabel Forest, Forest Road 435: along the road. Field Notes: Coll. No. 3319, 22 July 2024.

Name List: Asclepias hallii

3319. Asclepias hallii A. Gray. Short plants with large leaves and inflorescences. Along Pike-San Isabel Forest Road 435, 3.6 miles generally west of US highway 285, 112 km. southwest of Golden. (38.9561,-106.0187,WGS 1984) Road cut in fractured shale, below lodgepole pines. 7/22/2024 Salt Creek, Park County, Colorado. (d: CS(138) , KHD )

Coll. No. 3319, Asclepias, maybe A. hallii.

Coll. No. 3319, Asclepias hallii.

Field Notes: Coll. No. 3320, 23 Jul 2024.

Name List: Geum triflorum

3320. Geum triflorum Pursh. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 135 km. southwest of Golden. (39.0950,-106.5429,WGS 1984) Open spot among short (1 m.) willows, with Achillea millefolium, Taraxacum ceratophorum, and Phleum alpinum. 7/23/2024 Brumley, Lake County, Colorado. (d: CAS(135) , d: COLO(136) , d: REGIS(141) , UCR , x-CDA )

Coll. No. 3320, Geum triflorum.

Field Notes: Coll. No. 3321, 23 Jul 2024.

Name List: Achillea millefolium

3321. Achillea millefolium L. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 135 km. southwest of Golden. (39.0949,-106.5429,WGS 1984) Open spot among short (1 m.) willows, with Taraxacum ceratophorum, Geum triflorum, and Phleum alpinum. 7/23/2024 Brumley, Lake County, Colorado. (d: EIU(140) , UCR )

Field Notes: Coll. No. 3322, 23 Jul 2024.

Name List: Symphyotrichum foliaceum var. apricum

3322. Symphyotrichum foliaceum (DC.) G. L. Nesom var. apricum (A. Gray) G. L. Nesom. Magenta flowers just opening. Phyllary margins and tips purple. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 135 km. southwest of Golden. (39.0950,-106.5430,WGS 1984) Open spot among short (1 m.) willows, with Achillea millefolium, Taraxacum ceratophorum, Geum triflorum, and Phleum alpinum. 7/23/2024 Brumley, Lake County, Colorado. (UCR )

Coll. No. 3322, Symphyotrichum foliaceum var. apricum

Capitulum of Coll. No. 3322, Symphyotrichum foliaceum var. apricum

Field Notes: Coll. No. 3323, 23 Jul 2024.

Name List: Phleum alpinum

3323. Phleum alpinum L. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 135 km. southwest of Golden. (39.0951,-106.5430,WGS 1984) Nearly bare ground beside a clump of willows, with Achillea millefolium, Symphyotrichum foliaceum var. apricum, Taraxacum ceratophorum, and Geum triflorum. 7/23/2024 Brumley, Lake County, Colorado. (d: CS(138) , d: REGIS(141) , UCR , x-CDA )

Col. No. 3323, Phleum alpinum.

Colorado State Highway 82: at pullout. Field Notes: Coll. No. 3324, 23 Jul 2024.

Name List: Taraxacum ceratophorum

3324. Taraxacum ceratophorum (Ledeb.) DC. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 135 km. southwest of Golden. (39.0952,-106.5429,WGS 1984) Nearly bare ground beside a clump of willows, with Achillea millefolium, Symphyotrichum foliaceum var. apricum, Taraxacum ceratophorum, Geum triflorum, and Phleum alpinum. See also Robert M. King, #11520 BRYV137683, MO1732166, 7/23/2024 Brumley, Lake County, Colorado. (d: OBI(132) , d: UCR(133) , d: COLO(136) , KHD )

Coll. No. 3324, Taraxacum ceratophorum

Field Notes: Coll. No. 3325, 23 Jul 2024.

Name List: Cirsium parryi

3325. Cirsium parryi (A. Gray) Petr. Leaves adaxial glabrate, abaxial arachnoid, pre-anthesis. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 135 km. southwest of Golden. (39.0950,-106.5429,WGS 1984) Grassy areas between the highway and willows above North Fork of Lake Creek, with Achillea millefolium, Symphyotrichum foliaceum var. apricum, Taraxacum ceratophorum, Geum triflorum, and Phleum alpinum. 7/23/2024 Brumley, Lake County, Colorado. (d: OBI(132) , KHD )

Coll. No. 3325, Cirsium sp., cf. C. parryi (A. Gray) Petr.

Comments: 12/22/2024, See also Robert M. King, #11520, BRYV137683, MO1732166.

Field Notes: Coll. No. 3326, 23 Jul 2024.

Name List: Potentilla pulcherrima

3326. Potentilla pulcherrima Lehmann. Lvs palmate, lflts adaxial green, abaxial gray, toothed nearly full length, red-tipped glands in inflorescence. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 27.8 km. southwest of Leadville, 135 km. southwest of Golden. (39.0952,-106.5429,WGS 1984) Grassy areas between the highway and willows above North Fork of Lake Creek, with Achillea millefolium, Symphyotrichum foliaceum var. apricum, Taraxacum ceratophorum, Geum triflorum, and Phleum alpinum. 7/23/2024 Brumley, Lake County, Colorado. (d: COLO(136) , d: CS(138) , d: REGIS(141) , UCR , x-CDA )

Coll. No. 3326, Potentilla pulcherrima.

Field Notes: Coll. No. 3327, 23 Jul 2024.

Name List: Bistorta bistortoides

3327. Bistorta bistortoides (Pursh) Small. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 27.8 km. southwest of Leadville, 135 km. southwest of Golden. (39.0953,-106.5430,WGS 1984) Full sun just inside the willow thicket above North Fork of Lake Creek. 7/23/2024 Brumley, Lake County, Colorado. (d: CAS(135) , d: CS(138) , UCR , x-CDA )

Field Notes: Coll. No. 3328, 23 Jul 2024.

Name List: Antennaria rosea

3328. Antennaria rosea Greene. Inflorescence nodding. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 27.8 km. southwest of Leadville, 135 km. southwest of Golden. (39.0952,-106.5430,WGS 1984) Grassy areas between the highway and willows above North Fork of Lake Creek, with Achillea millefolium, Symphyotrichum foliaceum var. apricum, Taraxacum ceratophorum, Geum triflorum, and Phleum alpinum. 7/23/2024 Brumley, Lake County, Colorado. (d: COLO(136) , d: EIU(140) , UCR )

Field Notes: Coll. No. 3329, 23 Jul 2024.

Name List: Ligusticum tenuifolium

3329. Ligusticum tenuifolium S. Watson, Proc. Amer. Acad. Arts 14: 293 (1879), nom. illeg. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 27.8 km. southwest of Leadville, 135 km. southwest of Golden. (39.0955,-106.5433,WGS 1984) Water-saturated soil in willow thicket along former creek channels. 7/23/2024 Brumley, Lake County, Colorado. (d: UCR(133) , KHD )

Coll. No. 3329, Ligusticum filicinum var. tenuifolium.

Field Notes: Coll. No. 3330, 23 Jul 2024.

Name List: Caltha chionophila

3330. Caltha chionophila Greene. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 27.8 km. southwest of Leadville, 135 km. southwest of Golden. (39.0954,-106.5434,WGS 1984) Muddy side of former channel of North Fork of Lake Creek. 7/23/2024 Brumley, Lake County, Colorado. (d: COLO(136) , d: CS(138) , UCR )

Field Notes: Coll. No. 3331, 23 Jul 2024.

Name List: Cardamine cordifolia

3331. Cardamine cordifolia A. Gray. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 27.8 km. southwest of Leadville, 135 km. southwest of Golden. (39.0959,-106.5435,WGS 1984) Among creekside willows on bank of a former channel of North Fork of Lake Creek. 7/23/2024 Brumley, Lake County, Colorado. (d: EIU(140) , d: REGIS(141) , d: CAS(135) , UCR )

Field Notes: Coll. No. 3332, 23 Jul 2024.

Name List: Senecio crassulus

3332. Senecio crassulus A. Gray, Proc. Amer. Acad. Arts. 19: 54. 1883. Near the site of the stagecoach stop of Brumley, about 11 miles generally west on CO State Highway 82 from the town of Twin Lakes, Lake County, 27.8 km. southwest of Leadville, 135 km. southwest of Golden. (39.0957,-106.5434,WGS 1984) Bank above North Fork of Lake Creek, full sun in a thicket of low-growing willows. 7/23/2024 Brumley, Lake County, Colorado. (KHD83475^‡ , UCR309633^‡ )

Coll. No. 3332, Senecio crassulus.

Comments: 12/29/2024, Coll. No. 3332, 23 July 2024, characters observed: Perennial herb, 37 cm., caudex button-like, eglandular; Stem, glabrous; Leaves, alternate, petiole 43 mm., blade 75 mm. × 22 mm. wide, reduced distally, oblanceolate, mid-vein abaxially broad and margined, margin subtly dentate, few enlarged cells with a central cell larger (glandular?); Inflorescence, heads, 3-4 per stem, >leaves, erect; Peduncles, 4, 35, 50, 55 mm.; Involucre, 8 mm. × 8 mm. wide, cylindric; Phyllaries, 1 series, 6 mm. × 1.2 mm. wide, eglandular, tips, acute, black; Receptacle, epaleate; Flowers, 2 kinds Ray flowers, #13-15, tube 3.3 mm. + blade 9 mm. × 4 mm. wide, yellow, fertile; Disk flowers, many, tube 7 mm. + lobes 1 mm., yellow; Pappus, many well-developed capillary bristles, 5.5 mm., ±equal; Style, 2-branched; Cypsela, 2.0-2.6 mm. × 1 mm. wide, light brown, glabrous;

Field Notes: Coll. No. 3333, 24 July 2024.

Name List: Gayophytum racemosum

3333. Gayophytum racemosum Torr. & A. Gray. Very small, annual. Along Pike-San Isabel National Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2988,-106.3169,WGS 1984) Growing in an outlet ditch that was freshly bladed in 2023, with Collomia linearis and Polygonum polygaloides ssp. kelloggii. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: OBI(132) , d: UCR(133) , KHD )

Comments: 1/1/2025, Also known from the Upper Mono Lake Basin. , 1/1/2025, Coll. No. 3333, 24 July 2024, characters observed: Annual, to 15 cm., branched below the middle; Leaves, cauline, alternate; Petals, 1.3 mm., white; Capsules, 9-20 mm. × 1 mm. wide, linear, flat, valves coming free at middle; Seeds, w/o a tuft of hair.

Miscellaneous Notes on the Colorado Flora: Polygonum polygaloides kelloggii. Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3334, 24 July 2024.

Name List: Polygonum polygaloides ssp. kelloggii

3334. Polygonum polygaloides Meisn. ssp. kelloggii (Greene) J. C. Hickman. Annual, very small, congested inflorescence; however, the tepals have a green center. Along Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2988,-106.3169,WGS 1984) Growing in an outlet ditch that was freshly bladed in 2023, with Collomia linearis and Gayophytum racemosum. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: OBI(132) , KHD )

Coll. No. 3334, Polygonum polygaloides var. kelloggii

Comments: 1/1/2025, Also known from Upper Mono Lake Basin.

Field Notes: Coll. No. 3335, 24 July 2024.

Name List: Polygonum douglasii

3335. Polygonum douglasii Greene. 1-2 dm. tall, dispersed inflorescence, mature flowers reflexed. Along Pike-San Isabel National Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2988,-106.3170,WGS 1984) Growing in an outlet ditch that was freshly bladed in 2023, with Gayophytum racemosum, Collomia linearis, and Polygonum polygaloides ssp. kelloggii. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: OBI(132) , d: UCR(133) , KHD , x-CDA )

Field Notes: Coll. No. 3336, 24 July 2024.

Name List: Androsace septentrionalis

3336. Androsace septentrionalis L. In fruit, two plants, inflorescence interwoven, also seen elsewhere nearby. Along Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2988,-106.3170,WGS 1984) Edge of aspen forest, also nearby: Vicia americana var. americana and Anticlea elegans 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: OBI(132) , KHD )

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3337, 24 July 2024.

Name List: Collomia linearis

3337. Collomia linearis Nutt. Along Pike-San Isabel National Forest Road 189, about 1 km. east of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2988,-106.3169,WGS 1984) Growing in an outlet ditch that was freshly bladed in 2023, with Gayophytum racemosum, Polygonum douglasii, and P. polygaloides ssp. kelloggii. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: REGIS(141) , d: COLO(136) , d: EIU(140) , x-CDA )

Coll. No. 3337, Collomia linearis.

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3338, 24 July 2024.

Name List: Anticlea elegans

3338. Anticlea elegans (Pursh) Rydb. Along Pike-San Isabel National Forest Road 189, about 1 km. east of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2989,-106.3170,WGS 1984) Meadow on edge of aspens, with Vicia americana var. americana. Specimens with multiple bulbs were dug out as a unit. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (EIU , KHD83329^‡ , REGIS , x-CDA )

Coll. No. 3338, Anticlea elegans.

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3339, 24 July 2024.

Name List: Vicia americana var. americana

3339. Vicia americana Willd. var. americana. Along Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2989,-106.3171,WGS 1984) Twining on small willow stems and aspen branches, with Agoseris aurantica, Orthocarpus luteus, Pedicularis parryi, Androsace septentrionalis, and Anticlea elegans. Infraspecific names are not accepted by current Colorado florae. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: UCR(133) , d: OBI(132) , d: CAS(135) , KHD )

Coll. No. 3339, Vicia americana var. americana.

Field Notes: Coll. No. 3340, 24 July 2024.

Name List: Achillea millefolium

3340. Achillea millefolium L. Along Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2988,-106.3171,WGS 1984) Also nearby in and around a small aspen grove: Agoseris aurantica, Vicia americana, Orthocarpus luteus, Pedicularis parryi, Androsace septentrionalis, and Anticlea elegans. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (OBI , x-CDA )

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3341, 24 July 2024.

Name List: Agoseris aurantiaca var. aurantica

3341. Agoseris aurantiaca (Hooker) Greene var. aurantica. Along Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2988,-106.3169,WGS 1984) Also nearby in and around a small aspen grove: Achillea millefolium, Vicia americana, Orthocarpus luteus, Pedicularis parryi, Androsace septentrionalis, and Anticlea elegans. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (KHD )

Coll. No. 3341, Agoseris aurantica var. aurantica

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3342, 24 July 2024.

Name List: Taraxacum ceratophorum

3342. Taraxacum ceratophorum (Ledeb.) DC. About 45 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2986,-106.3173,WGS 1984) Openings in sagebrush. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: OBI(132) , d: CS(138) , KHD )

Coll. No. 3342, Taraxacum ceratophorum.

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3343, 24 July 2024.

Name List: Festuca idahoensis

3343. Festuca idahoensis Elmer. Fine leaves, panicle infl. About 50 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2986,-106.3174,WGS 1984) Collected with Artemisia tridentata and Taraxacum ceratophorum. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (KHD )

Coll. No. 3343, Festuca idahoensis.

Comments: 12/25/2024, Coll. No. 3343, 24 July 2024, characters observed: Perennial grass, 50-60 cm., clumped; Stem, upright at base, glabrous below inflorescence; Nodes, black; Leaves, most leaves basal, sheath, 150 mm., open, ligule, 1 mm., blade, 80 mm. × 0.5 mm. wide, conduplicate; Inflorescence, 1 per culm, >leaves, panicle, 105 mm. × 20 mm wide, 1-2 branches; Rachis, not extended, softly scabrous; Spikelets, many, 7-8 mm. × 1.7-2.0 mm. wide, similar, borne singly, pedicels, 1-4 mm.; Glumes, lower, 3.5 mm. × 1 mm. wide, center green, margins purple, veins, 1, [except for mid-veins on glumes and lemmas, most veins are ±obscure], upper, 4.5 mm. × 1.3 mm. wide, <lowest floret, veins, 3(?), awns, 0; Florets, 5 per spikelet, fertile; Lemma, 5 mm., ±= upper glume, rolled, veins, 3 or 5, ±obscure, tip, acute, awns, #1, 3 mm., straight, attached, end, tip, acute; Palea, 5 mm., ±= lemma, tip, bifid; Anthers, 2 mm., purple; Ovary, apex, glabrous; Achene, 1 mm., brown;

Field Notes: Coll. No. 3343.1, 24 Jul 2024.

Name List: Eriocoma lettermanii

3343.1 Eriocoma lettermanii (Vasey) Romansch. fine leaves, panicle infl. About 50 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2986,-106.3174,WGS 1984) Collected with Artemisia tridentata, Taraxacum ceratophorum, and Festuca idahoensis. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (CS )

Coll. No. 3343.1, Eriocoma lettermanii.

Comments: 12/25/2024, Coll. No. 3343.1, 24 July 2024, characters observed: Perennial grass, 30 cm.; Leaves, sheath, open, ligule, membranous, blade, involute; Inflorescence, 1 per culm, <leaves, contracted panicle; Spikelets, many, 7 mm. × 1 mm. wide, similar, borne singly; Glumes, lower, 6 mm. veins, #3, upper, 5.5 mm. >lowest floret, veins, #3, awns, #1, 1 mm.; Florets, 1 per spikelet; Callus, straight white hairs; Lemma, 4.5 mm., <glumes, unevenly hairy, hairs, straight, apical hears ≤1.5 mm., awns, #1, 15 mm, twisted; Palea, 3.5 mm. = 77% of lemma, apical hairs > apex. Anthers, 1.8 mm., yellow + black.

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3344, 24 July 2024.

Name List: Artemisia tridentata ssp. vaseyana

3344. Artemisia tridentata Nutt. ssp. vaseyana (Rydb.) Beetle. Leaf blades short relative to width, heads in narrow paniculiform arrays. About 50 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2986,-106.3174,WGS 1984) In patches among willows and aspen, with Taraxacum ceratophorum, Eriocoma lettermanii, Festuca idahoensis, and Festuca thurberi. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: REGIS(141) , d: OBI(132) , d: UCR(133) , KHD )

Coll. No. 3344, Artemisia tridentata ssp. vaseyana

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3345, 24 July 2024.

Name List: Festuca thurberi

3345. Festuca thurberi Vasey. Tall cespitose grass in bloom. About 55 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2985,-106.3173,WGS 1984) Between patches of Artemisia tridentata, with Agoseris aurantiaca, Taraxacum ceratophorum, Geum triflorum, Eriocoma lettermanii, and Festuca idahoensis. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (KHD )

Coll. No. 3345, Festuca thurberi.

Comments: 12/26/2024, Coll. No. 3345, 24 July 2024, characters observed: Perennial grass, to 60 cm., cespitose; Leaves, sheath, open, ligule, membranous, 5 mm., bifid, auricles, 0, blade, 25 cm. × 1 mm. wide, involute, glabrous, but white-spotted; Inflorescence, 1 per culm, <leaves, panicle, 95 mm. × 65 mm. wide, #3 branches; Rachis, not extended, plumose hairy; Spikelets, many, 11 mm. × 2.6 mm. wide, similar, borne singly, stalked, pedicels 1.5-3.0 mm.; Compression, unremarkable; Disarticulation, between florets; Glumes, lower, 3.7 mm., veins, #1, upper, 4 mm., veins, #3, <lowest floret, colors green to purple to scarious, awns, 0; Florets, 4 per spikelet, Axis (within the spikelet), extended beyond upper floret; Lemma, 6.8 mm. >glumes, rolled, glabrous, veins, #5, glabrous, tip, acute to 0.2 mm. awn; Palea, 6.3 mm., <lemma; Anthers, 4 mm., purple.

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3346, 24 July 2024.

Name List: Agoseris aurantiaca var. aurantica

3346. Agoseris aurantiaca (Hooker) Greene var. aurantica. Three scapes: two flowers, one fruit. About 70 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2984,-106.3174,WGS 1984) Openings in sagebrush with Taraxacum ceratophorum, and Geum triflorum. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (OBI )

Coll. No. 3346, Agoseris aurantica var. aurantica

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3347, 24 July 2024.

Name List: Descurainia incisa ssp. incisa

3347. Descurainia incisa (Engelm.) Britton ssp. incisa. About 90 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2981,-106.3172,WGS 1984) Small slope, damp areas amongst willows. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: OBI(132) , KHD )

Coll. No. 3347, Descurainia incisa ssp. incisa.

Field Notes: Coll. No. 3347.1, 24 July 2024.

Name List: Boechera stricta

3347.1 Boechera stricta (Graham) Al-Shebaz. About 90 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2981,-106.3172,WGS 1984) Small slope, damp areas amongst willows, with Descurainia incisa. Coll. Nos. 3347.1, 3349, & 3350, made within 30 m. of each other, are the same taxon. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (x-CDA )

Coll. Nos. 3347.1 & 3350, Boechera stricta.

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3348, 24 July 2024.

Name List: Cardamine cordifolia

3348. Cardamine cordifolia A. Gray. Flowers white. About 100 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2980,-106.3171,WGS 1984) Bank of small creek in willows. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: COLO(136) , x-CDA )

Coll. No. 3348, Cardamine cordifolia.

Field Notes: Coll. No. 3348.1, 24 July 2024.

Name List: Oxypolis fendleri

3348.1 Oxypolis fendleri (A. Gray) Heller. Flowers white. About 100 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2980,-106.3171,WGS 1984) Bank of small creek in willows, also here: Cardamine cordifolia and Bistorta vivipara. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: REGIS(141) , KHD )

Colorado, Pike-San Isabel National Forest, Forest Road 189: on the road. Field Notes: Coll. No. 3348.2, 24 July 2024.

Name List: Bistorta vivipara

3348.2 Bistorta vivipara (L.) Delarbre. About 100 m. southwest of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2980,-106.3171,WGS 1984) Bank of small creek in willows, also here: Oxypolis fendleri and Cardamine cordifolia. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (d: CS(138) , UCR )

Coll. No. 3348.2, Bistorta vivipara.

Field Notes: Coll. No. 3349, 24 July 2024.

Name List: Boechera stricta

3349. Boechera stricta (Graham) Al-Shebaz. Flowers white to light lavender. About 100 m. south of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2980,-106.3170,WGS 1984) Sunny opening in willow thicket. Coll. Nos. 3347.1, 3349, & 3350, made within 30 m. of each other, are the same taxon. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (EIU )

Field Notes: Coll. No. 3350, 24 July 2024.

Name List: Boechera stricta

3350. Boechera stricta (Graham) Al-Shebaz. Flowers white to light lavender. About 95 m. south of Forest Road 189, about 1 km. west of County Road 18 �East Tennessee Road,� 7.37 km. north northwest of the GNIS location of Leadville. Openings in aspen forest, mixed with patches of big sagebrush and willows. (39.2980,-106.3169,WGS 1984) Sunny opening in willow thicket. Coll. Nos. 3347.1, 3349, & 3350, made within 30 m. of each other, are the same taxon. 7/24/2024 Unnamed Gulch on Forest Road 189, Lake County, Colorado. (REGIS )

Coll. Nos. 3347.1 & 3350, Boechera stricta.

Field Notes: Coll. No. 3351, 25 Jul 2024.

Name List: Shepherdia canadensis

3351. Shepherdia canadensis (L.) Nutt. Four sepals, small green berry. Hillslope between Lily Lake and North Fork West Tennessee Creek, about 550 m. east of Lily Lake, and 675 m. northwest of the crossing of FR 131 by the Colorado Trail. (39.3504,-106.3637,WGS 1984) Lodgepole pine forest, also collected nearby: Vaccinium scoparium. 7/25/2024 North Fork West Tennessee Creek, Lake County, Colorado. (CAS1411787^‡ , COLO , CS )

Coll. No. 3351, Shepherdia canadensis.

Miscellaneous Notes on the Colorado Flora: Silene menziesii Hook. Field Notes: Coll. No. 3352, 25 Jul 2024.

Name List: Silene menziesii

3352. Silene menziesii Hook. Perennial, rhizomatous. Hillslope between Lily Lake and North Fork West Tennessee Creek, about 425 m. east of Lily Lake, and 520 m. northwest of the crossing of FR 131 by the Colorado Trail, 12.2 km. north northwest of Leadville, 108 km. west southwest of Golden. (39.3504,-106.3638,WGS 1984) Open lodgepole forest floor, with Vaccinium scoparium. 7/25/2024 North Fork West Tennessee Creek, Lake County, Colorado. (d: UCR(133) , d: CS(138) , d: OBI(132) , KHD )

Habitat of Coll. No. 3352, Silene menziesii.

Coll. No. 3352, Silene menziesii.

Flower of Coll. No. 3352, Silene menziesii.

Coll. No. 3352, Silene menziesii.

Comments: 1/7/2025, Coll. No. 3352, 25 July 2024, characters observed: Perennial of forest floor, to 10 cm., rhizomatous; Leaves, cauline, opposite, sessile, 31 mm. × 7 mm. wide, adaxially glabrous, abaxially short curved hairs, margin entire, ciliate, purple; Flowers, upper axils, pedicel, 8 mm., glandular; Calyx, tube 5 mm. + lobes (#5) 1.7 mm., veins, #10, glandular; Hypanthium (??), disk-like (??) Carphophore, 1 mm.; Petals, 9 mm. × 3 mm. wide, clawed?, notched, white fading to light yellow, united at base (??); Anthers, #10?, didymous?, white, inserted; Ovary, superior, 3 mm. × 1.8 mm., Styles, #3, exserted.

Field Notes: Coll. No. 3353, 25 Jul 2024.

Name List: Vaccinium scoparium

3353. Vaccinium scoparium Leiberg ex Coville. Hill between Lily Lake and North Fork West Tennessee Creek, about 375 m. east of Lily Lake, and 560 m. northwest of the crossing of FR 131 by the Colorado Trail. (39.3504,-106.3643,WGS 1984) Gentle slope near top of hill with lodgepole forest. 7/25/2024 North Fork West Tennessee Creek, Lake County, Colorado. (d: EIU(140) , CS )

Coll. No. 3353, Vaccinium scoparium.

Habitat of Coll. No. 3353, Vaccinium scoparium.

Field Notes: Coll. No. 3354, 25 Jul 2024.

Name List: Orthilia secunda

3354. Orthilia secunda (L.) House. About 15 m. into the lodgepole pine forest from the east shore of Lily Lake, at the end of Pike-San Isabel National Forest Road 131, 12.8 km. north northwest of Leadville, 108 km. west southwest of Golden. (39.3506,-106.3671,WGS 1984) Wet lodgepole pine forest floor with Pyrola asarifolia. 7/24/2024 Lily Lake, Lake County, Colorado. (d: COLO(136) , d: CS(138) , UCR )

Field Notes: Coll. No. 3354.1, 25 Jul 2024.

Name List: Pyrola asarifolia

3354.1 Pyrola asarifolia Michx. Infl. bracts longer than subtended pedicels; calyx lobes longer than wide. About 15 m. into the lodgepole pine forest from the east shore of Lily Lake, at the end of Pike-San Isabel National Forest Road 131, 12.8 km. north northwest of Leadville, 108 km. west southwest of Golden.Wet lodgepole pine forest floor with Orthilia secunda. 7/25/2024 Lily Lake, Lake County, Colorado. (KHD )

Coll. No. 3354.1, Pyrola asarifolia.

Inflorescence of Coll. No. 3354.1, Pyrola asarifolia.

Nuphar polysepala Engelm. “Rocky Mountain Pond Lily”: Introduction. Field Notes: Coll. No. 3355, 25 Jul 2024.

Name List: Nuphar polysepala

3355. Nuphar polysepala Engelm. Northeast shore of Lily Lake, accessed by way of National Forest Road 131, 12.9 km. northwest of Leadville, 108 km. southwest of Golden. (39.3512,-106.3675,WGS 1984) 7/25/2024 Lily Lake, Lake County, Colorado. (d: OBI(132) , KHD )

Coll. No. 3355, Nuphar polysepala.

Field Notes: Coll. No. 3356, 26 Jul 2024.

Name List: Mentha arvensis

3356. Mentha arvensis L. Single plant with 6-7 stems. Very aromatic. High plains above Rocky Flats, 1.7 miles west on Colorado Highway 72 from Colorado Highway 93, 0.8 miles north on Plainview Road, then 200 meters northwest to a small reservoir on an ephemeral stream. (39.8864,-105.2641,WGS 1984) Small wetland below reservoir, with Persicaria pensylvanica. 7/26/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (CS , REGIS )

Field Notes: Coll. No. 3357, 26 Jul 2024.

Name List: Heterotheca villosa

3357. Heterotheca villosa (Pursh) Shinners. Ray flowers absent, greatly reduced, or, perhaps, the ligules were all eaten by insects before the collection was made. High plains above Rocky Flats, 1.7 miles west on Colorado Highway 72 from Colorado Highway 93, 0.8 miles north on Plainview Road, then 295 meters west along the southern border of Ranson/Edwards. (39.8845,-105.2659,WGS 1984) Probably var. nana. 7/26/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (JCOS )

Coll. No. 3357, Heterotheca villosa.

Inflorescence of Coll. No. 3357, Heterotheca villosa.

Comments: 1/11/2025, Coll. No. 3357, 26 July 2024, characters observed: Perennial herb, 25 cm., caudex unknown; Stem, purple, hirsute, short and long hairs; Leaves, basal, none seen, cauline, alternate, sessile, 22 mm. × 5.5 mm. wide, slightly reduced distally, oblong, entire, single nerve (definitely not tri-nerved), glandular, tips, spine-tipped; Inflorescence, 2-3 heads per stem, not showy, >leaves, erect; Involucre, 10 mm. × 13 mm. wide; Phyllaries, 3± series, 7 mm. × 1 mm. wide, lower < rest of involucre, green, tips purple; Receptacle, epaleate; Ray flowers, none seen, probably eaten by insects before collection was made; Disk flowers, many, tube 6 mm. + lobes 0.7 mm., yellow; Pappus, many, well-developed capillary bristles, 6 mm., ±equal; Cypsela, 2 mm. × __ mm. wide, ascending long hairy.

Field Notes: Coll. No. 3358, 30 Jul 2024.

Name List: Cenchrus longispinus

3358. Cenchrus longispinus (Hack.) Fern. In planted native grass beds, along 23rd Street, opposite Vernon Drive, 1.72 km. southeast of the GNIS location of Golden. Native to Colorado, but usually found in sandy habitats. (39.7490,-105.2080,WGS 1984) Unclear whether this grass was at DeLong Park before park construction, brought in with the soil amendment, or was a contaminant in the seed mix. First seen in Golden's DeLong Park following construction of the new park in 2022; recently found in New Loveland Mine Park in 2024. 7/30/2024 DeLong Park (City of Golden), Jefferson County, Colorado. (d: CAS(135) , d: EIU(140) , d: REGIS(141) , FLD )

Field Notes: Coll. No. 3359, 10 Aug 2024.

Name List: Helianthus pauciflorus ssp. subrhomboideus

3359. Helianthus pauciflorus Nutt. ssp. subrhomboideus (Rydb.) O. Spring & E. Schilling. Near the southern edge of Ranson/Edwards, 1.7 mi. west on CO Hwy 72 from CO Hwy 93, then 0.9 mi generally north in Plainview Road, then 110 m. northwest into the field, 14.8 km. north of Golden (39.8851,-105.2633,WGS 1984) Open fields with Bromus inermis and Artemisia ludoviciana; also seen or collected nearby Solidago rigida var. humilis, Opuntia fragilis, and Sisyrinchium montanum. 8/10/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (d: COLO(136) , d: Demo , d: CS(138) , x-CDA )

Field Notes: Coll. No. 3360, 13 Aug 2024.

Name List: Andropogon gerardii

3360. Andropogon gerardii Vitman. City park on 23rd Street at Vernon Drive, in hydroseeded “native ” area. (39.7487,-105.2080,WGS 1984) Growing with Coll. No. 3384, Bothriochloa bladhii. 8/13/2024 DeLong Park (City of Golden), Jefferson County, Colorado. (d: CofG(139) , KHD )

Field Notes: Coll. No. 3361, 14 Aug 2024.

Name List: Pericome caudata

3361. Pericome caudata A. Gray. South side of Peaks to Plains Trail, just below the Canal Zone Climbing area, about 1/2 mile west of the Gateway Trailhead. (39.7503,-105.2485,WGS 1984) GPS data inaccurate because of deep canyon, location placed 25 m. southwest of GPS reading per GoogleEarth. 8/14/2024 Clear Creek Canyon Park, Jefferson County, Colorado. (JCOS , KHD83326^‡ , OBI^‡ , UCR248779^‡ )

Field Notes: Coll. No. 3363, 23 Aug 2024.

Name List: Solidago rigida var. humilis

3363. Solidago rigida L. var. humilis Porter. In clumps, proximal cauline leaves withered. High plains above Rocky Flats, 1.7 miles west on Colorado Highway 72 from Colorado Highway 93, 0.8 miles generally north on Plainview Road, then 170 meters west along the southern border of Ranson/Edwards. (39.8844,-105.2645,WGS 1984) With Heterotheca villosa, Symphyotrichum ericoides, Rosa arkansana, and Phleum pratense. 8/23/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (d: COLO(136) , d: CS(138) , d: CAS(135) , x-CDA )

Field Notes: Coll. No. 3364, 30 Aug 2024.

Name List: Helianthus pauciflorus ssp. subrhomboideus

3364. Helianthus pauciflorus Nutt. ssp. subrhomboideus (Rydb.) O. Spring & E. Schilling. Six seed heads for propagation. (39.8846,-105.2637,WGS 1984) 8/30/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (Undist. )

Field Notes: Coll. No. 3365, 30 Aug 2024.

Name List: Heterotheca villosa var. nana

3365. Heterotheca villosa (Pursh) Shinners var. nana (A. Gray) Semple. Many of the ray flower ligules have been eaten giving the inflorescence a discoid appearance. High plains above Rocky Flats, 1.7 miles west on Colorado Highway 72 from Colorado Highway 93, 0.8 miles generally north on Plainview Road, then 175 meters west along the southern border of Ranson/Edwards. (39.8844,-105.2645,WGS 1984) With Solidago mollis, Symphyotrichum ericoides, Rosa arkansana, and Phleum pratense. 8/30/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (KHD )

Coll. No. 3365, Heterotheca villosa var. nana.

Field Notes: Coll. No. 3366, 30 Aug 2024.

Name List: Madia glomerata

3366. Madia glomerata Hook. High plains above Rocky Flats, 1.7 miles west on Colorado Highway 72 from Colorado Highway 93, 0.9 miles generally north on Plainview Road, then 330 m west along a small stream. (39.8867,-105.2657,WGS 1984) More seen just east (downstream) of the small reservoir on this same stream. 8/30/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (KHD83324^‡ )

Coll. No. 3366, Madia glomerata.

Field Notes: Coll. No. 3366.1, 30 Aug 2024.

Name List: Mentha arvensis

3366.1 Mentha arvensis L. High plains above Rocky Flats, 1.7 miles west on Colorado Highway 72 from Colorado Highway 93, 0.9 miles generally north on Plainview Road, then 330 m west along a small stream. (39.8867,-105.2657,WGS 1984) Growing with Madia glomerata. 8/30/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (KHD )

Field Notes: Coll. No. 3367, 30 Aug 2024.

Name List: Gentiana affinis

3367. Gentiana affinis Griseb. High plains above Rocky Flats, 1.7 miles west on Colorado Highway 72 from Colorado Highway 93, 2.0 miles generally north on Plainview Road, then 30 m southwest above the road. (39.8969,-105.2697,WGS 1984) In grasses under ponderosa pines. 8/30/2024 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (OBI , x-CDA )

Kinney Run Trail, Golden, Jefferson County, Colorado: south of stream. Field Notes: Coll. No. 3368, 4 Sep 2024.

Name List: Lycium barbarum

3368. Lycium barbarum L. Flowers lavender, darker throat, fading brown, corolla lobes < tube, leaves petiolate. About 8 m. west of the Kinney Run Trail, close to its origin at the end of Tripp Drive, and adjacent to a small watercourse tributary to Kinney Run, 3.57 km. south of the GNIS location of Golden. (39.7239,-105.2139,WGS 1984) With Cirsium canadensis, Ericameria nauseosa var. graveolens, and Bromus inermis. iNaturalist: 239862182. 9/4/2024 Kinney Run, Jefferson County, Colorado. (d: CS(138) , d: COLO(136) , d: KHD(131) , JCOS )

Coll. No. 3368, Lycium barbarum.

Rimrock Drive, Golden, Jefferson County, Colorado: at W 17th Pl. Field Notes: Coll. No. 3369, 11 Sep 2024.

Name List: Atriplex canescens

3369. Atriplex canescens (Pursh) Nutt. Uncommon in Golden and vicinity. Lowest southwestern slope of South Table Mountain just above 17000 block of Rimrock Drive, within city limits of Golden. (39.7440,-105.2010,WGS 1984) Also here: Artemisia dracunculus, Ericameria nauseosa, both var. nauseosa and var. graveolens, Grindelia squarrosa, Ratibida columnifera, Opuntia macrorhiza, and Bromus tectorum; with Rhus trilobata on the slope above. 9/11/2024 South Table Mountain Park, Jefferson County, Colorado. (d: OBI(132) , d: CS(138) , d: REGIS(141) , d: UCR(133) , d: KHD(131) , JCOS )

Coll. No. 3369, Atriplex canescens.

Field Notes: Coll. No. 3370, 11 Sep 2024.

Name List: Ericameria nauseosa var. nauseosa

3370. Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird var. nauseosa. Scattered low shrubs, flowers just starting to open. Middle of the southwestern slope of South Table Mountain just above 17000 block of Rimrock Drive, within city limits of Golden. (39.7452,-105.2007,WGS 1984) With Ericameria nauseosa var. graveolens, Grindelia squarrosa, Opuntia macrorhiza, and Agropyron cristatum. 9/11/2024 South Table Mountain Park, Jefferson County, Colorado. (d: KHD(131) , d: OBI(132) , d: UCR(133) , JCOS )

Coll. No. 3370, Ericameria nauseosa var. nauseosa

Field Notes: Coll. No. 3371, 12 Sep 2024.

Name List: Senecio spartioides

3371. Senecio spartioides Torr. & A. Gray. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2265,-105.3055,WGS 1984) Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, Eriocoma lettermanii, Bouteloua gracilis, and Bouteloua simplex. This area burned in the Hayman Fire of 2002. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (d: COLO(136) , d: CS(138) , d: REGIS(141) , CAS )

Field Notes: Coll. No. 3372, 12 Sep 2024.

Name List: Dieteria bigelovii var. bigelovii

3372. Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartman var. bigelovii. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2265,-105.3055,WGS 1984) Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, Eriocoma lettermanii, Bouteloua gracilis, and Bouteloua simplex. This area burned in the Hayman Fire of 2002. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (d: COLO(136) , d: REGIS(141) , d: CS(138) , d: EIU(140) )

Field Notes: Coll. No. 3373, 12 Sep 2024.

Name List: Muhlenbergia montana

3373. Muhlenbergia montana (Nutt.) Hitchc. Common in patches. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2265,-105.3056,WGS 1984) Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, Eriocoma lettermanii, Bouteloua gracilis, and Bouteloua simplex. This area burned in the Hayman Fire of 2002. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (d: CS(138) , d: EIU(140) , KHD , x-CDA )

Forest Road 211, Pike-San Isabel National Forest: at camp site 2. Field Notes: Coll. No. 3374, 12 Sep 2024.

Name List: Hymenothrix dissecta

3374. Hymenothrix dissecta (A. Gray) B. G. Baldwin. Cauline leaves ternately dissected. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2261,-105.3057,WGS 1984) Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, Eriocoma lettermanii, Bouteloua gracilis, and Bouteloua simplex. This area burned in the Hayman Fire of 2002. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (d: OBI(132) , d: UCR(133) , d: COLO(136) , KHD )

Coll. No. 3374, Hymenothrix dissecta.

Comments: 9/13/2024, Holotype: U. S. A., New Mexico, a few miles E of Mora River, Aug 1847, A. Fendler 537 (GH barcode 00000807! [digital image]).

Field Notes: Coll. No. 3375, 12 Sep 2024.

Name List: Solidago missouriensis

3375. Solidago missouriensis Nutt. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2265,-105.3061,WGS 1984) Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Hymenothrix dissecta, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, Eriocoma lettermanii, Bouteloua gracilis, and Bouteloua simplex. This area burned in the Hayman Fire of 2002. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (OBI^‡ , UCR248676^‡ )

Forest Road 211, Pike-San Isabel National Forest: at camp site 2. Field Notes: Coll. No. 3376, 12 Sep 2024.

Name List: Heterotheca villosa var. minor

3376. Heterotheca villosa (Pursh) Shinners var. minor (Hook.) Semple. Stems, upper leaves, and phyllaries quite glandular. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2263,-105.3055,WGS 1984) Thin ponderosa pine forest with Erigeron divergens, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, Eriocoma lettermanii, Bouteloua gracilis, and Bouteloua simplex. This area burned in the Hayman Fire of 2002. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (d: OBI(132) , d: UCR(133) , d: COLO(136) , KHD )

Fruit of Coll. No. 3376, Heterotheca villosa var. minor.

Field Notes: Coll. No. 3377, 12 Sep 2024.

Name List: Bouteloua gracilis

3377. Bouteloua gracilis (Kunth) Lag. ex Griffiths. Plants robust, though short. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2262,-105.3058,WGS 1984) Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, Eriocoma lettermanii and Bouteloua simplex. This area burned in the Hayman Fire of 2002. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (FLD , KHD83421^‡ , OBI^‡ , UCR248674^‡ )

Coll. No. 3377, Bouteloua gracilis.

Forest Road 211, Pike-San Isabel National Forest: at camp site 2. Field Notes: Coll. No. 3378, 12 Sep 2024.

Name List: Castilleja integra

3378. Castilleja integra A. Gray. Small colony, short, stems tomentose, bracts entire, orange-red to deep red with occasional purplish cast. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2262,-105.3055,WGS 1984) Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Eriocoma lettermanii and Bouteloua simplex. This area burned in the Hayman Fire of 2002. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (KHD83559^‡ , OBI^‡ )

Coll. No. 3378, Castilleja integra.

Field Notes: Coll. No. 3379, 12 Sep 2024.

Name List: Eriocoma robusta

3379. Eriocoma robusta (Vasey) Romasch. Non-rhizomatous bunch grass. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2264,-105.3059,WGS 1984) Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, and Bouteloua simplex. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (d: CS(138) , KHD83420^‡ , OBI^‡ , UCR309639^‡ )

Comments: 1/17/2025, Coll. No. 3379, 12 September 2024, characters observed: Leaves, flag, collar, sparsely hairy; Panicle contracted, Glumes, subequal; Lemma, 5.5 mm., hairs at apex, 1.1-1.2 mm., longer than hairs on body, Awn, 19 mm., 2×geniculate, Palea, 4 mm., 72% of lemma, + hairs 0.2 mm. > apex.

Miscellaneous Notes on the Colorado Flora: Bouteloua simplex. Forest Road 211, Pike-San Isabel National Forest: at camp site 2. Field Notes: Coll. No. 3380, 12 Sep 2024.

Name List: Bouteloua simplex

3380. Bouteloua simplex Lag. Very small grass. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2263,-105.3059,WGS 1984) Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, and Eriocoma robusta. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (d: UCR(133) , d: OBI(132) , KHD )

Coll. No. 3380, Bouteloua simplex.

Comments: 1/17/2025, Coll. No. 3380, 12 September 2024, characters observed: Annual grass, to 2 cm., in little tufts; Leaves, sheath, 8 mm., open, ligule, ciliate, 0.2 mm., blade, 12 mm. × 0.8 mm. wide, involute, glabrous; Inflorescence, 1 per culm, <leaves, eyelash-like raceme of 14-15 spikelets, 12 mm. × 3.5 mm. wide; Spikelets, 4 mm. × 1 mm. wide, similar, borne singly, pedicels 0.3 mm.; Disarticulation, above the glumes. Glumes, lower, 1.6-1.7 mm., veins, 1, upper, 3.0-3.2 mm., <lowest floret, veins, 1, awns, 0; Florets, 2 per spikelet, 1 fertile + 1 sterile reduced; Lemma, 4 mm., >glumes, proximally 0.6 mm. straight white hairs mostly along mid-vein and margin, veins, #3, parallel and extended like flattened awns; Palea, 2.5 mm.; Achene, 1.5 mm. × 0.6 mm. wide, flattened, greenish-brown.

Forest Road 211, Pike-San Isabel National Forest: at camp site 2. Field Notes: Coll. No. 3381, 12 Sep 2024.

Name List: Erigeron divergens

3381. Erigeron divergens Torr. & A. Gray. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2263,-105.3064,WGS 1984) Thin ponderosa pine forest with Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, Eriocoma nelsonii, and Vulpia octoflora. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (KHD )

Coll. No. 3381, Erigeron divergens.

Comments: 1/17/2025, Coll. No. 3381, 12 September 2024, characters observed: Annual or short-lived perennial, 25 cm., caudex taprooted, without leafy runners of rhizomes; Stem, pubescent-hispidulous (short rough hairs generally curved in all directions); Leaves, basal and proximal cauline withered, alternate, sessile, blade 17 mm. × 1.6 mm. wide, linear-oblong, entire; Involucre, 5 mm.; Phyllaries, 2+ series, 3.5 mm. × 0.5 mm. wide, ±green, with purple tips; Receptacle, epaleate; Flowers, 2 kinds; Rays, many, tube 1 mm. + blade 6 mm. × 0.5 mm. wide, spreading, lavender, fertile; Disc flowers, many, tube 2 mm. + lobes 0.3 mm., yellow; Pappus, scales, #8±, capillary bristles, #6-8, 1.5-1.8 mm.; Cypsela, 0.8 mm. × 0.3 mm. wide, 4-angled, tan-ish, few appressed hairs. , 2/8/2025, Three vouchers indicated, found one in KHD, not sure where the other two went.

Field Notes: Coll. No. 3382, 12 Sep 2024.

Name List: Townsendia grandiflora

3382. Townsendia grandiflora Nutt. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2263,-105.3064,WGS 1984) Thin ponderosa pine forest with Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Castilleja integra, Eriocoma nelsonii, and Vulpia octoflora. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (KHD )

Forest Road 211, Pike-San Isabel National Forest: at camp site 2. Field Notes: Coll. No. 3383, 12 Sep 2024.

Name List: Symphyotrichum porteri

3383. Symphyotrichum porteri (A. Gray) G.L. Nesom. Along Pike-San Isabel National Forest Road 211, about 3.6 miles generally southwest of its northern end at County Road 126 “Deckers Road,” 59 km. south of Golden. (39.2265,-105.3055,WGS 1984) Thin ponderosa pine forest with Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Castilleja integra, Eriocoma nelsonii, and Vulpia octoflora. 9/12/2024 Dispersed Camp Site #2, Jefferson County, Colorado. (KHD83591^‡ )

Coll. No. 3383, Symphyotrichum porteri.

Comments: 1/15/2025, Coll. No. 3383, 12 September 2024, characters observed: Perennial herb, to 30 cm.; Leaves, basal cluster present at flowering, entire, glabrous, margin ciliate, tip spinulose; Receptacle, epaleate; Phyllaries, 2+ series, somewhat ciliate, tip spinulose; Flowers, 2 kinds; Rays, white; Disc flowers, yellow, fading brown; Pappus, well-developed capillary bristles.

Field Notes: Coll. No. 3384, 24 Sep 2024.

Name List: Bothriochloa bladhii

3384. Bothriochloa bladhii (Retz.) S.T. Blake. City park on 23rd Street at Vernon Drive, in hydroseeded “native ” area. (39.7488,-105.2080,WGS 1984) Growing with Coll. No. 3360, Andropogon gerardii. This or something similar also seen at New Loveland Mine Park. 9/24/2024 DeLong Park (City of Golden), Jefferson County, Colorado. (d: CofG(139) , d: CS(138) , d: KHD(131) , d: COLO(136) )

Bothriochloa bladhii in DeLong Park.

Field Notes: Coll. No. 3385, 12 May 2025.

Name List: Agoseris parviflora

3385. Agoseris parviflora (Nutt.) D. Dietr. Along the City of Golden 6th Avenue Trail just inside the southwest boundary of the Parfet Prehistoric Preserve, part of the Morrison-Golden Fossil Area National Natural Landmark, 1.65 km. south of the GNIS location of Golden. (39.7407,-105.2191,WGS 1984) In a low area that may concentrate moisture; with Artemisia dracunculus, A.ludoviciana, Scorzonera laciniata, Alyssum simplex, Astragalus sp., and Bromus inermis. iNaturalist: 280624751. 5/12/2025 Parfet Prehistoric Preserve, Jefferson County, Colorado. (d: FLD(151) , OBI )

Coll. No. 3385, Agoseris glauca.

Coll. No. 3385, Agoseris parviflora.

North Table Mountain Trail, City of Golden, Jefferson County, Colorado: s. of watercourse. Field Notes: Coll. No. 3386, 16 May 2025.

Name List: Senecio integerrimus

3386. Senecio integerrimus Nutt. Along City of Golden North Table Mountain Trail in the northern part of the open space, very windy northwest slope, 2.35 km. north of the GNIS location of Golden. (39.7764,-105.2258,WGS 1984) With Artemisia dracunculus, A. ludoviciana, Alysum simplex, Lupinus argenteus, Prunus virginiana and Verbascum thapsus. This parcel was designated a City of Golden Open Space in 2025. Variety exaltatus if infraspecific names are to be applied. 5/16/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (CAS , FLD )

Coll. No. 3386, Senecion integerrimus.

Coll. No. 3386, Senecio integerrimus.

Field Notes: Coll. No. 3387, 16 May 2025.

Name List: Agoseris parviflora

3387. Agoseris parviflora (Nutt.) D. Dietr. Flowers yellow, fading blue-ish. Short grass prairie on nearly-bare basalt flow, near the corner of North Table Loop at its intersection with Golden Cliffs and Climbing Access Trails, 1.8 km. north of the GNIS location of Golden. (39.7718,-105.2210,WGS 1984) Collected nearby: Astragalus agrestis and Viola nuttallii. 5/16/2025 North Table Mountain Park, Jefferson County, Colorado. (JCOSs.n. , REGIS )

Field Notes: Coll. No. 3388, 21 May 2025.

Name List: Thlaspi arvense

3388. Thlaspi arvense L. Small glabrous annual, leaves sessile sagittate dentate, flowers white, silicle ovoid & notched. Lowest east-facing slope of a small ridge mapped as South Platte Formation adjacent to the Golden fault, 4.96 km. south southwest of the GNIS location of Golden. (39.7131,-105.2030,WGS 1984) With Marubium vulgare, Cercocarpus montanus, and Rumex crispus. Very small examples of this common weed. 5/21/2025 Tin Cup Ridge, Jefferson County, Colorado. (FLD , JCOSs.n. , REGIS )

Field Notes: Coll. No. 3389, 21 May 2025.

Name List: Lappula texana

3389. Lappula texana (Scheele) Britton. Small annual borage, nutlet prickles are joined at the base forming a low ring around the margin. Lowest east-facing slope of a small ridge mapped as South Platte Formation adjacent to the Golden fault, 4.96 km. south southwest of the GNIS location of Golden. (39.7131,-105.2030,WGS 1984) With Thlaspi arvense, Marubium vulgare, Cercocarpus montanus, and Rumex crispus. Coordinates estimated from nearby collections. 5/21/2025 Tin Cup Ridge, Jefferson County, Colorado. (JCOSs.n. , OBI )

Field Notes: Coll. No. 3390, 21 May 2025.

Name List: Rhus trilobata var. trilobata

3390. Rhus trilobata Nutt. var. trilobata. In bloom, leaves juvenile. Mid-slope east side of Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, 5.14 km. south southwest of the GNIS location of Golden. (39.7113,-105.2033,WGS 1984) Coordinates estimated from numerically adjacent collections. 5/21/2025 Tin Cup Ridge, Jefferson County, Colorado. (FLD , OBI , UCR )

Coll. No. 3390 Rhus trilobata var. trilobata.

Field Notes: Coll. No. 3391.1, 21 May 2025.

Name List: Lappula texana

3391.1 Lappula texana (Scheele) Britton. Bases of prickles confluent. Along the top of Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, in more open areas adjacent to ponderosa pines, 4.95 km. south of the GNIS location of Golden. (39.7128,-105.2049,WGS 1984) Bare and sparsely vegetated soil with Pinus scopulorum, Crepis occidentalis, Helianthus pumilus, Gilia sp. and Potentilla recta 5/21/2025 Tin Cup Ridge, Jefferson County, Colorado. (FLD , REGIS )

Coll. No. 3391.1, Lappula texana.

Field Notes: Coll. No. 3391.2, 21 May 2025.

Name List: Gilia ophthalmoides

3391.2 Gilia ophthalmoides Brand. Annual, lower stem arachnose, cauline glands black dots, corolla throat yellow, petals abaxial purple, adaxial white. Along the top of Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, in more open areas adjacent to ponderosa pines, 4.95 km. south of the GNIS location of Golden. (39.7128,-105.2049,WGS 1984) Edge of small grove of ponderosa pines, with Agoseris parviflora, Crepis occidentalis, Heterotheca villosa and Lappula texana (syn: L. occidentalis var. cupulata). 5/21/2025 Tin Cup Ridge, Jefferson County, Colorado. (CAS , JCOSs.n. , REGIS , UCR )

Coll. No. 3391.2, Gilia ophthalmoides.

Field Notes: Coll. No. 3392, 21 May 2025.

Name List: Agoseris parviflora

3392. Agoseris parviflora (Nutt.) D. Dietr. Some leaves retrorsely dentate, flowers yellow fading bluish, beak length unknown. Along the top of Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, in more open areas adjacent to ponderosa pines, 4.95 km. south of the GNIS location of Golden. (39.7128,-105.2048,WGS 1984) Edge of small grove of ponderosa pines, with Crepis occidentalis, Heterotheca villosa, Lappula texana (syn: L. occidentalis var. cupulata), and Gilia ophthalmoides. iNaturalist: 283400249. 5/21/2025 Tin Cup Ridge, Jefferson County, Colorado. (EIU , UCR )

Coll. No. 3392, Agoseris parviflora on Tin Cup Ridge.

Coll. No. 3392, Agoseris parviflora.

Field Notes: Coll. No. 3393, 21 May 2025.

Name List: Crepis occidentalis ssp. costata

3393. Crepis occidentalis Nutt. ssp. costata (A. Gray) Babcock & Stebbins. Phyllaries stipitate-glandular with black setae. Along the top of Tin Cup Ridge, the northward extension of Dinosaur Ridge into Golden, between rock outcrops and adjacent to ponderosa pines, 4.79 km. south of the GNIS location of Golden. (39.7142,-105.2058,WGS 1984) Previously collected here: Heuchera parvifolia and Phlox multiflora. 5/21/2025 Tin Cup Ridge, Jefferson County, Colorado. (COLO , FLD , REGIS )

Coll. No. 3393, Crepis occidentalis ssp. costata on Tin Cup Ridge.

Coll. No. 3393, Crepis occidentalis ssp. costata

Field Notes: Coll. No. 3394, 1 Jun 2025.

Name List: Arnica fulgens

3394. Arnica fulgens Pursh. Most plants in seed, a few still in flower, late in flower season for this plant. Edge of the parasailer landing field along US Highway 6, below the Welch Ditch, near the northeast boundary of the open space, disturbed mixed-grass prairie, 930 m. southwest of the GNIS location of Golden. (39.7500,-105.2293,WGS 1984) Also collected here: Juncus arcticus var. balticus. This parcel was designated a City of Golden Open Space in 2025. 6/1/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (EIU , FLD , OBI )

Field Notes: Coll. No. 3395, 1 Jun 2025.

Name List: Juncus arcticus var. balticus

3395. Juncus arcticus (Willd.) Trautv. var. balticus (Willdenow) Trautvetter. Edge of the parasailer landing field along US Highway 6, below the Welch Ditch, near the northeast boundary of the open space, disturbed mixed-grass prairie, 930 m. southwest of the GNIS location of Golden. (39.7500,-105.2296,WGS 1984) Also collected here: Arnica fulgens. This parcel was designated a City of Golden Open Space in 2025. 6/1/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (OBI )

Field Notes: Coll. No. 3396, 1 Jun 2025.

Name List: Oenothera howardii

3396. Oenothera howardii (A. Nels.) W. L. Wagner. Flowers bright yellow, fading bronze. West central part of the open space, above the Welch Ditch, above the social trail and getting close to the houses, 1.06 km. southwest of the GNIS location of Golden. (39.7489,-105.2301,WGS 1984) Mixed-grass prairie, with Ericameria nauseosa var. nauseosa, Gutierrezia sarothrae, Kraschinnikovia lanata, Allium textile, Andropogon gerardii, and Bouteloua curtipendula. This parcel was designated a City of Golden Open Space in 2025. 6/1/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (OBI )

Coll. No. 3396, Oenothera howardii.

Field Notes: Coll. No. 3397, 1 Jun 2025.

Name List: Hybanthus verticillatus

3397. Hybanthus verticillatus (Ortega) Baill. East central portion of the open space, on the southwest end of a small ridge that appears to part of the pre-development topography, 970 m. southwest of the GNIS location of Golden. (39.7491,-105.2287,WGS 1984) Also seen or collected on this ridge: Artemisia campestris, Grindelia subalpina, Townsendia grandiflora, Xanthisma spinulosum, Mentzelia nuda, and Mirabilis linearis. This parcel was designated a City of Golden Open Space in 2025. 6/1/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (CAS , UCR )

Coll. No. 3397, Hybanthus verticillatus.

North Table Loop, Jefferson County, Colorado: near Golden Cliffs Trl. Field Notes: Coll. No. 3398, 8 Jun 2025.

Name List: Rosa acicularis ssp. sayi

3398. Rosa acicularis Lindl. ssp. sayi (Schwein.) W. H. Lewis. Many fine, long prickles on new growth, 7 leaflets per leaf. In the bed of partially filled-in small reservoir, along the North Table Mountain Loop trail, about 140 m. east of its junction with the Golden Cliffs Trail, 815 m. south of Lichen Peak, and 1.78 km. north of the GNIS location of Golden. (39.7713,-105.2197,WGS 1984) Wet soil, with Artemisia ludoviciana, Senecio integerrimus, Lupinus argenteus, and Poa compressa. Coordinates estimated with GoogleEarth. 6/1/2025 North Table Mountain Park, Jefferson County, Colorado. (CAS , FLD , JCOSs.n. )

Rosa acicularis ssp. sayi on North Table Mountain.

Coll. No. 3398, Rosa acicularis ssp. sayi.

Field Notes: Coll. No. 3399, 10 Jun 2025.

Name List: Sonchus asper

3399. Sonchus asper (L.) Hill. Northeast corner of the park, near 23rd Street. (39.7490,-105.2080,WGS 1984) Also here: Ambrosia psilostachya, Lepidium draba, Trifolium repens, Agropyron cristatum, Cenchrus longispinus, and Dactylis glomerata. DeLong Park was a private residence that was left fallow for a number of years, then converted to a city park in 2021-2022. 6/10/2025 DeLong Park (City of Golden), Jefferson County, Colorado. (REGIS )

Coll. No. 3399, Sonchus asper.

Field Notes: Coll. No. 3400, 18 Jun 2025.

Name List: Lithospermum multiflorum

3400. Lithospermum multiflorum Torrey ex A. Gray. Between Molly Gulch and the former Molly Gulch campground, about 8 miles west and south on F. R. 211 from County Road 126, then 200 m. east toward Goose Creek, 12.1 km. southwest of Deckers. (39.1942,-105.3439,WGS 1984) Steep slope above Goose Creek, open ponderosa pine and Douglas fir forest. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Molly Gulch, Jefferson County, Colorado. (CAS , EIU , FLD , OBI )

Field Notes: Coll. No. 3401, 18 Jun 2025.

Name List: Cornus sericea ssp. sericea

3401. Cornus sericea L. ssp. sericea. Nearly finished flowering. On a terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1949,-105.3421,WGS 1984) Ponderosa pine and Douglas fir forest with Ribes cereum, Anemonastrum canadense, Geum macrophyllum, Galium boreale and Carex inops ssp. heliophila. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (KHD , OBI , UCR )

Coll. No. 3401, Cornus sericea ssp. sericea.

Field Notes: Coll. No. 3402, 18 Jun 2025.

Name List: Geum macrophyllum var. perincisum

3402. Geum macrophyllum Willd. var. perincisum (Rydb.) Raup. Epicalyx bractlets absent, styles hooked, styles have few hairs in some flowers, glands not seen. On a terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1949,-105.3421,WGS 1984) Ponderosa pine and Douglas fir forest with Cornus sericea, Ribes cereum, Anemonastrum canadense, Galium boreale and Carex inops ssp. heliophila. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (EIU , FLD , KHD , REGIS )

Coll. No. 3402, Geum macrophyllum ver. perincisum.

Field Notes: Coll. No. 3403, 18 Jun 2025.

Name List: Veronica americana

3403. Veronica americana (Raf.) Benth. Leaves petiolate; flowers in axillary racemes. In running water and creek gravel on the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1949,-105.3420,WGS 1984) Ponderosa pine and Douglas fir forest with Cornus sericea, Ribes cereum, Anemonastrum canadense, Geum macrophyllum var. perincisum, Galium boreale and Carex inops ssp. heliophila. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (KHD )

Coll. No. 3403, Veronica americana.

Field Notes: Coll. No. 3405, 18 June 2025.

Name List: Erigeron flagellaris

3405. Erigeron flagellaris A. Gray. Peduncle hairs ascending to appressed. On a terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1949,-105.3421,WGS 1984) Ponderosa pine and Douglas fir forest with Cornus sericea, Ribes cereum, Anemonastrum canadense, Geum macrophyllum var. perincisum, Galium boreale and Carex inops ssp. heliophila. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (CAS , COLO , FLD )

Field Notes: Coll. No. 3405.1, 18 June 2025.

Name List: Anemonastrum canadense

3405.1 Anemonastrum canadense (L.) Mosyakin. On a terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1949,-105.3421,WGS 1984) Ponderosa pine and Douglas fir forest with Erigeron flagellaris, Cornus sericea, Ribes cereum, Geum macrophyllum var. perincisum, Galium boreale and Carex inops ssp. heliophila. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (KHD , OBI )

Coll. No. 3505.1, Anemonastrum canadense.

Field Notes: Coll. No. 3406, 18 June 2025.

Name List: Cymopterus lemmonii

3406. Cymopterus lemmonii (J. M. Coult. & Rose) Dorn. On a shaded terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1950,-105.3423,WGS 1984) Ponderosa pine and Douglas fir forest with Erigeron flagellaris, Cornus sericea, Ribes cereum, Anemonastrum canadense, Geum macrophyllum var. perincisum, Galium boreale and Carex inops ssp. heliophila. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (CAS , FLD , OBI , UCR )

Field Notes: Coll. No. 3407, 18 June 2025.

Name List: Carex inops ssp. heliophila

3407. Carex inops L. H. Bailey ssp. heliophila (Mack.) Crins. On a terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1950,-105.3424,WGS 1984) Ponderosa pine and Douglas fir forest with Cymopterus lemmonii, Erigeron flagellaris, Cornus sericea, Ribes cereum, Anemonastrum canadense, Geum macrophyllum var. perincisum, and Galium boreale. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (FLD , KHD )

Field Notes: Coll. No. 3407.1, 18 June 2025.

Name List: Carex occidentalis

3407.1 Carex occidentalis L. H. Bailey. On a terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1950,-105.3424,WGS 1984) Ponderosa pine and Douglas fir forest with Cymopterus lemmonii, Erigeron flagellaris, Cornus sericea, Ribes cereum, Anemonastrum canadense, Geum macrophyllum var. perincisum, Galium boreale and Carex inops var heliophila. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (KHD )

Field Notes: Coll. No. 3407.2, 18 June 2025.

Name List: Juncus

3407.2 Juncus L. On a terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1950,-105.3424,WGS 1984) Ponderosa pine and Douglas fir forest with Cymopterus lemmonii, Erigeron flagellaris, Cornus sericea, Ribes cereum, Anemonastrum canadense, Geum macrophyllum var. perincisum, and Carex inops var heliophila. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado.

Field Notes: Coll. No. 3408, 18 June 2025.

Name List: Galium boreale

3408. Galium boreale L. On a terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1950,-105.3424,WGS 1984) Ponderosa pine and Douglas fir forest with Cymopterus lemmonii, Erigeron flagellaris, Cornus sericea, Ribes cereum, Anemonastrum canadense, Geum macrophyllum var. perincisum, and Carex inops var heliophila. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (CAS , FLD )

Field Notes: Coll. No. 3409, 18 June 2025.

Name List: Hesperostipa comata

3409. Hesperostipa comata (Trin. & Rupr.) Barkworth. On a terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1950,-105.3424,WGS 1984) Ponderosa pine and Douglas fir forest with Cymopterus lemmonii, Erigeron flagellaris, Cornus sericea, Ribes cereum, Anemonastrum canadense, Geum macrophyllum var. perincisum, Galium boreale, and Carex inops var heliophila. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (CAS , FLD )

Field Notes: Coll. No. 3410, 18 June 2025.

Name List: Rosa arkansana

3410. Rosa arkansana Porter. Small prickles on new growth, 7-9 leaflets per leaf, leaflets contiguous, terminal blade margins dentate. On a terrace of the right bank of Twin Creek, near its mouth at Goose Creek, about 250 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1952,-105.3425,WGS 1984) Ponderosa pine and Douglas fir forest with Cymopterus lemmonii, Erigeron flagellaris, Ribes cereum, Anemonastrum canadense, Geum macrophyllum var. perincisum, Galium boreale, Carex inops var heliophila and Hesperostipa comata. Mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (OBI , UCR )

Coll. No. 3410, Rosa arkansana.

Field Notes: Coll. No. 3411, 18 June 2025.

Name List: Humulus neomexicanus

3411. Humulus neomexicanus (A. Nelson & Cockerell) Rydb. Sterile, season too early for flowers or fruit. On the right bank of Twin Creek, 130 m. above its mouth at Goose Creek, about 180 m. east-southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1956,-105.3429,WGS 1984) Jumbled down logs with shrubs and herbs including Artemisia frigida, Cirsium vulgare, Ribes idaeus, R. inerme, Thalictrum fendleri, Physocarpus monogynus, and Prunus virginiana. Mixed burned and live mature Douglas fir and ponderosa pines suggest the Hayman Fire (2002) may have burned with low to medium intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (KHD , OBI )

Coll. No. 3411, Humulus neomexicanus.

Field Notes: Coll. No. 3412, 18 June 2025.

Name List: Packera fendleri

3412. Packera fendleri (A. Gray) W.A. Weber & �. L�ve. Above Twin Creek and Goose Creek, 100 m. southeast of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1956,-105.3442,WGS 1984) Open Ponderosa pine forest floor almost devoid of understory, with small Cercocarpus montanus, and occasional Artemisia ludoviciana, Erysimum capitatum, Drymocallis fissa, and Potentilla hippiana. Hayman Fire (2002) mapped as moderate intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (OBI )

Field Notes: Coll. No. 3413, 18 June 2025.

Name List: Packera fendleri

3413. Packera fendleri (A. Gray) W.A. Weber & �. L�ve. Above Twin Creek and Goose Creek, 90 m. south of the Sheeprock Trailhead, 7.7 mi. west and south on F. R. 211 from County Road 126., 11.9 km. southwest of Deckers. (39.1955,-105.3453,WGS 1984) Open Ponderosa pine forest floor almost devoid of understory, with small Cercocarpus montanus, and occasional Artemisia ludoviciana, Erysimum capitatum, Drymocallis fissa, and Potentilla hippiana. Hayman Fire (2002) mapped as moderate intensity here. 6/18/2025 Twin Creek, Jefferson County, Colorado. (CAS , COLO )

Coll. No. 3413, Packera fendleri.

Field Notes: Coll. No. 3414, 18 June 2025.

Name List: Penstemon virens

3414. Penstemon virens Pennell ex Rydb. Beside a cow/horse trail along North Twin Creek, 60 m. northwest of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.5 km. southwest of Deckers. (39.2084,-105.3457,WGS 1984) Open ponderosa pine and Douglas fir forest, Oxytropis lambertii also collected at this location. Mature trees suggest the Hayman Fire (2002) burned with low intensity here. 6/18/2025 North Twin Creek, Jefferson County, Colorado. (FLD , KHD , UCR )

Field Notes: Coll. No. 3415, 18 June 2025.

Name List: Oxytropis lambertii

3415. Oxytropis lambertii Pursh. Flowers magenta, fading blue. Beside a cow/horse trail along North Twin Creek, 60 m. northwest of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.5 km. southwest of Deckers. (39.2084,-105.3457,WGS 1984) Open ponderosa pine and Douglas fir forest, Penstemon virens also collected at this location. Mature trees suggest the Hayman Fire (2002) burned with low intensity here. 6/18/2025 North Twin Creek, Jefferson County, Colorado. (CAS , EIU , FLD , OBI , UCR )

Coll. No. 3415, Oxytropis lambertii.

Field Notes: Coll. No. 3416, 18 June 2025.

Name List: Sedum lanceolatum

3416. Sedum lanceolatum Torr. Above the left bank of North Twin Creek, 125 m. northwest of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.5 km. southwest of Deckers. (39.2090,-105.3459,WGS 1984) In granite sand and gravel among outcrops of Pikes Peak granite with an open ponderosa pine and Douglas fir forest and Jamesia americana and Scutellaria brittonii. Mature trees suggest the Hayman Fire (2002) burned with low intensity here. 6/18/2025 North Twin Creek, Jefferson County, Colorado. (FLD )

Field Notes: Coll. No. 3417, 18 June 2025.

Name List: Scutellaria brittonii

3417. Scutellaria brittonii Porter. Above the left bank of North Twin Creek, 125 m. northwest of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.5 km. southwest of Deckers. (39.2091,-105.3459,WGS 1984) In granite sand and gravel among outcrops of Pikes Peak granite with an open ponderosa pine and Douglas fir forest and Jamesia americana and Sedum lanceolatum. Mature trees suggest the Hayman Fire (2002) burned with low intensity here. 6/18/2025 North Twin Creek, Jefferson County, Colorado. (FLD )

Field Notes: Coll. No. 3418, 18 June 2025.

Name List: Jamesia americana var. americana

3418. Jamesia americana Torr. & A. Gray var. americana. Above the left bank of North Twin Creek, 125 m. northwest of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.5 km. southwest of Deckers. (39.2091,-105.3460,WGS 1984) In granite sand and gravel among outcrops of Pikes Peak granite with an open ponderosa pine and Douglas fir forest and Scutellaria brittonii and Sedum lanceolatum. Mature trees suggest the Hayman Fire (2002) burned with low intensity here. 6/18/2025 North Twin Creek, Jefferson County, Colorado. (CAS , COLO , UCR )

Field Notes: Coll. No. 3419, 18 June 2025.

Name List: Heuchera parvifolia

3419. Heuchera parvifolia Nutt. ex Torr. & A. Gray. Low ridge south of North Twin Creek, 120 m. west northwest of the F. R. 211 crossing of North Twin Creek. 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.5 km. southwest of Deckers. (39.2084,-105.3465,WGS 1984) Gentle northeast slope, open ponderosa pine and Douglas fir woodland, also collected here: Eremogone fendleri and Synthyris plantaginea. Burned by the Hayman Fire (2002), though mapped as low intensity in this location. 6/18/2025 North Twin Creek, Jefferson County, Colorado. (CAS , COLO )

Field Notes: Coll. No. 3420, 18 June 2025.

Name List: Synthyris plantaginea

3420. Synthyris plantaginea (James) Benth. Low ridge south of North Twin Creek, 120 m. west northwest of the F. R. 211 crossing of North Twin Creek. 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.5 km. southwest of Deckers. (39.2084,-105.3465,WGS 1984) Gentle northeast slope, open ponderosa pine and Douglas fir woodland, also collected here: Eremogone fendleri and Heuchera parvifolia. Burned by the Hayman Fire (2002), though mapped as low intensity in this location. 6/18/2025 North Twin Creek, Jefferson County, Colorado. (OBI , UCR )

Coll. No. 3420, Synthyris plantaginea.

Field Notes: Coll. No. 3421, 18 June 2025.

Name List: Geranium caespitosum

3421. Geranium caespitosum James. Petals pink, magenta guides. sticky. Near top of a low ridge south of North Twin Creek, 140 m. west of the F. R. 211 crossing of North Twin Creek. 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.5 km. southwest of Deckers. (39.2080,-105.3467,WGS 1984) Gentle northeast slope, open ponderosa pine and Douglas fir woodland, also collected here: Castilleja integra and Ceanothus fendleri. Burned by the Hayman Fire (2002), though mapped as low intensity in this location. 6/18/2025 North Twin Creek, Jefferson County, Colorado. (KHD )

Coll. No. 3421, Geranium caespitosum.

Field Notes: Coll. No. 3422, 18 June 2025.

Name List: Castilleja integra

3422. Castilleja integra A. Gray. Near top of a low ridge south of North Twin Creek, 140 m. west of the F. R. 211 crossing of North Twin Creek. 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.5 km. southwest of Deckers. (39.2079,-105.3467,WGS 1984) Gentle northeast slope, open ponderosa pine and Douglas fir woodland, also collected here: Geranium caespitosum and Ceanothus fendleri. Burned by the Hayman Fire (2002), though mapped as low intensity in this location. 6/18/2025 North Twin Creek, Jefferson County, Colorado. (FLD , UCR )

Inflorescence of Coll. No. 3422, Castilleja integra.

Coll. No. 3422, Castilleja integra.

Field Notes: Coll. No. 3423, 23 Jun 2025.

Name List: Lupinus argenteus var. argenteus

3423. Lupinus argenteus Pursh var. argenteus. Basal leaves withered, very small spur. Southwest slope of North Table Mountain, northern part of the open space, along a social trail, in an area of hummocky ground suggesting an ancient landslide, 2.34 km. north of the GNIS location of Golden. (39.7764,-105.2255,WGS 1984) Low shrubs, forbs, and grasses, with Grindelia subalpina, Heterotheca villosa, Monarda fistulosa, Carex inops var. heliophila, and Bromus japonicus. 6/23/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: EIU(149) , d: FLD(151) , CS )

Field Notes: Coll. No. 3424, 23 Jun 2025.

Name List: Bromus japonicus

3424. Bromus japonicus Thunb. Southwest slope of North Table Mountain, northern part of the open space, along a social trail, in an area of hummocky ground suggesting an ancient landslide, 2.34 km. north of the GNIS location of Golden. (39.7764,-105.2255,WGS 1984) Low shrubs, forbs, and grasses, with Grindelia subalpina, Heterotheca villosa, Lupinus argenteus var. argenteus, Monarda fistulosa, and Carex inops var. heliophila. 6/23/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: CAS(146) , d: FLD(151) , UCR )

Field Notes: Coll. No. 3425, 23 Jun 2025.

Name List: Monarda fistulosa

3425. Monarda fistulosa L. Southwest slope of North Table Mountain, northern part of the open space, along a social trail, in an area of hummocky ground suggesting an ancient landslide, 2.34 km. north of the GNIS location of Golden. (39.7763,-105.2255,WGS 1984) Low shrubs, forbs, and grasses, with Grindelia subalpina, Heterotheca villosa, Lupinus argenteus var. argenteus, Carex inops var. heliophila, and Bromus japonicus. 6/23/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: OBI(144) , d: UCR(145) , d: FLD(151) )

Field Notes: Coll. No. 3426, 23 Jun 2025.

Name List: Heterotheca villosa var. minor

3426. Heterotheca villosa (Pursh) Shinners var. minor (Hook.) Semple. Southwest slope of North Table Mountain, northern part of the open space, along a social trail, in an area of hummocky ground suggesting an ancient landslide, 2.34 km. north of the GNIS location of Golden. (39.7764,-105.2255,WGS 1984) Low shrubs, forbs, and grasses, with Grindelia subalpina, Lupinus argenteus var. argenteus, Monarda fistulosa, Carex inops var. heliophila, and Bromus japonicus. Designated a City of Golden Open Space in 2025. 6/23/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: FLD(151) , d: COLO(147) , UCR )

Field Notes: Coll. No. 3427, 23 Jun 2025.

Name List: Achillea millefolium

3427. Achillea millefolium L. Southwest slope of North Table Mountain, northern part of the open space, along a social trail, in an area of hummocky ground suggesting an ancient landslide, 2.39 km. north of the GNIS location of Golden. (39.7769,-105.2250,WGS 1984) Low shrubs, forbs, and grasses, with Ligusticum porteri, Artemisia ludoviciana, Carduus nutans, Gutierrezia sarothrae, Turritis glabra, and Toxicoscordion paniculatum. Designated a City of Golden Open Space in 2025. 6/23/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: EIU(149) , UCR )

Field Notes: Coll. No. 3428, 23 Jun 2025.

Name List: Ligusticum porteri

3428. Ligusticum porteri J.M. Coult. & Rose. Basal leaves reddish at base. Along a social trail in the northern part of the North Table Mountain Open Space, beside one of the larger watercourses coming down from the top of the mesa, 2.4 km. north of the GNIS location of Golden. (39.7772,-105.2249,WGS 1984) Seen or collected narby: Ericameria nauseosa var. graveolens, Campanula rotundifolia, Prunus americana, P. virginiana, Acer glabrum, and Bromus inermis. 6/23/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (CS , KHD )

Coll. No. 3428, Ligusticum porteri.

Field Notes: Coll. No. 3429, 23 Jun 2025.

Name List: Acer glabrum

3429. Acer glabrum Torr. Along a social trail in the northern part of the North Table Mountain Open Space, beside one of the larger watercourses coming down from the top of the mesa, 2.42 km. north of the GNIS location of Golden. (39.7772,-105.2248,WGS 1984) Seen or collected nearby: Ericameria nauseosa var. graveolens, Campanula rotundifolia, Prunus americana, P. virginiana, Galium boreale, and Bromus inermis. One of several quintessential Jefferson County taxa, as the type was collected in Platte Canyon by Dr. Edwin James of the Major Stephen H. Long expedition of 1820. 6/23/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: CAS(146) , KHD )

Miscellaneous Notes on the Colorado Flora: Heracleum maximum. Field Notes: Coll. No. 3430, 2 Jul 2025.

Name List: Heracleum maximum

3430. Heracleum maximum Bartr. Leaves ternate, large lobes, flowers white. Left bank of North Twin Creek, 185 m. northwest of the F. R. 211 crossing of North Twin Creek. 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2089,-105.3470,WGS 1984) Streamside mature ponderosa pine and Douglas fir forest, also collected here: Monarda fistulosa, Rubis idaeus, and Verbascum thapsus. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (KHD )

Coll. No. 3430, Heracleum maximum.

Field Notes: Coll. No. 3431, 2 Jul 2025.

Name List: Rudbeckia laciniata var. ampla

3431. Rudbeckia laciniata L. var. ampla (A. Nelson) Cronquist. Left bank of North Twin Creek, 205 m. northwest of the F. R. 211 crossing of North Twin Creek. 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2089,-105.3473,WGS 1984) Streamside among aspen and water birch near creek in mature ponderosa pine and Douglas fir forest, also collected here: Betula occidentalis, Monarda fistulosa, Rosa acicularis ssp. sayi, Rubis idaeus, and Verbascum thapsus. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (UCR )

Field Notes: Coll. No. 3432, 2 Jul 2025.

Name List: Primula pauciflora var. pauciflora

3432. Primula pauciflora (Durand) A. R. Mast & Reveal var. pauciflora. Left bank of North Twin Creek, 205 m. northwest of the F. R. 211 crossing of North Twin Creek. 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2089,-105.3473,WGS 1984) Streamside among aspen and water birch near creek in mature ponderosa pine and Douglas fir forest, also collected here: Betula occidentalis, Monarda fistulosa, Rosa acicularis ssp. sayi, Rubis idaeus, and Verbascum thapsus. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (FLD , OBI )

Field Notes: Coll. No. 3432.1, 2 Jul 2025.

Name List: Circaea alpina

3432.1 Circaea alpina L. Left bank of North Twin Creek, 205 m. northwest of the F. R. 211 crossing of North Twin Creek. 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2089,-105.3473,WGS 1984) Streamside among aspen and water birch near creek in mature ponderosa pine and Douglas fir forest, also collected here: Betula occidentalis, Monarda fistulosa, Primula pauciflora, Rosa acicularis ssp. sayi, and Rubis idaeus. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (FLD )

Field Notes: Coll. No. 3433, 2 Jul 2025.

Name List: Rudbeckia hirta var. pulcherrima

3433. Rudbeckia hirta L. var. pulcherrima Farw. Solitary plants to clumps of 12 stems. Yellow rays, pappus absent, hirsute. Left bank of North Twin Creek, 215 m. northwest of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2089,-105.3473,WGS 1984) Streamside among aspen and water birch near creek in mature ponderosa pine and Douglas fir forest, also collected here: Betula occidentalis, Monarda fistulosa, Primula pauciflora, Rosa acicularis ssp. sayi, and Rubus idaeus. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (COLO , CS , FLD )

Coll. No. 3433, Rudbeckia hirta var. pulchellum

Coll. No. 3433, Rudbeckia hirta var. pulcherrima.

Field Notes: Coll. No. 3434, 2 Jul 2025.

Name List: Geranium richardsonii

3434. Geranium richardsonii Fisch. & Trautv. Cauline leaf lobes acute; pedicels glandular, some purple-tipped; petals white without purple guidelines. Left bank of North Twin Creek, 210 m. northwest of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2090,-105.3475,WGS 1984) Mature ponderosa pine and Douglas fir forest away from creek, also here: Rudbeckia hirta var. pulcherrima, G. caespitosum, Monarda fistulosa, Primula pauciflora, Rosa acicularis ssp. sayi, and Rubus idaeus. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (CS , EIU , FLD )

Coll. No. 3434, Geranium richardsonii.

Field Notes: Coll. No. 3435, 2 Jul 2025.

Name List: Betula occidentalis

3435. Betula occidentalis Hook. Left bank of North Twin Creek, 230 m. northwest of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2089,-105.3475,WGS 1984) Streamside with aspen in mature ponderosa pine and Douglas fir forest, also collected here: Monarda fistulosa, Circaea alpina, Primula pauciflora var. pauciflora, Rosa acicularis ssp. sayi, and Rubus idaeus. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (CAS , FLD , OBI , UCR )

Coll. No. 3435, Betula occidentalis.

Field Notes: Coll. No. 3436, 2 Jul 2025.

Name List: Cymopterus lemmonii

3436. Cymopterus lemmonii (J. M. Coult. & Rose) Dorn. Finished flowering, in fruit. Left bank of North Twin Creek, 275 m. northwest of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2093,-105.3478,WGS 1984) Open Douglas fir and ponderosa pine forest floor, away from the creek, without middlestory, also here: Nassella viridula. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (CS , KHD )

Field Notes: Coll. No. 3437, 2 Jul 2025.

Name List: Platanthera aquilonis

3437. Platanthera aquilonis Sheviak. On a right branch of North Twin Creek, 870 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2142,-105.3513,WGS 1984) Bank of creek among willows, with Mertensia sp., Dasiphora fruticosa, Carex stipata, and Juncus sp. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity; vegetated only on the creek, forest not re-established away from creek. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (OBI )

Coll. No. 3437, Platanthera?

Coll. No. 3437, Platanthera aquilonis.

Field Notes: Coll. No. 3437.1, 2 Jul 2025.

Name List: Mertensia ciliata var. ciliata

3437.1 Mertensia ciliata (Torr.) G. Don var. ciliata. On a right branch of North Twin Creek, 870 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2142,-105.3513,WGS 1984) Bank of creek among willows, with Dasiphora fruticosa, Platanthera aquilonis, Carex stipata, and Juncus sp. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity; vegetated only on the creek, forest not re-established away from creek. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (FLD , UCR )

Field Notes: Coll. No. 3438, 2 Jul 2025.

Name List: Dasiphora fruticosa

3438. Dasiphora fruticosa (L.) Rydb. On a right branch of North Twin Creek, about 870 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2145,-105.3514,WGS 1984) Bank of creek among aspen and river birch, with Mertensia ciliata, Platanthera aquilonis, Carex stipata, and Juncus sp. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity; vegetated only on the creek, forest not re-established away from creek. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (CAS , UCR )

Small wetland around creek below burned slopes.

Field Notes: Coll. No. 3439, 2 Jul 2025.

Name List: Carex stipata

3439. Carex stipata Muhl. ex Willd. Sheath fronts faintly cross rugulose. On a right branch of North Twin Creek, about 900 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2145,-105.3514,WGS 1984) Bank of creek among aspen and river birch, with Mertensia ciliata, Dasiphora fruticosa, Platanthera aquilonis, and Juncus sp. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity; vegetated only on the creek, forest not re-established away from creek. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (KHD , OBI )

Field Notes: Coll. No. 3439.1, 2 Jul 2025.

Name List: Juncus ensifolius

3439.1 Juncus ensifolius Wikstr. Leaf blades equitant. On a right branch of North Twin Creek, about 900 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2145,-105.3514,WGS 1984) Bank of creek among aspen and river birch, with Mertensia ciliata, Dasiphora fruticosa, Platanthera aquilonis, and Carex stipata. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity; vegetated only on the creek, forest not re-established away from creek. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (CAS )

Coll. No. 3439.1, Juncus ensifolius.

Field Notes: Coll. No. 3439.2, 2 Jul 2025.

Name List: Carex interior

3439.2 Carex interior L. H. Bailey. Stellate with a short beak. On a right branch of North Twin Creek, about 900 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2145,-105.3514,WGS 1984) Bank of creek among aspen and river birch, with Mertensia ciliata, Dasiphora fruticosa, Platanthera aquilonis, Juncus ensifolius, and Carex stipata. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity; vegetated only on the creek, forest not re-established away from creek. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (KHD )

Coll. No. 3439.2, Carex interior.

Inflorescence of Coll. No. 3439.2, Carex interior.

Field Notes: Coll. No. 3439.3, 2 Jul 2025.

Name List: Carex leptalea

3439.3 Carex leptalea Wahlenberg. Accidental collection with #3439.2. A tiny little piece that probably does not deserve a voucher. On a right branch of North Twin Creek, about 900 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2145,-105.3514,WGS 1984) Bank of creek among aspen and river birch, with Mertensia ciliata, Dasiphora fruticosa, Platanthera aquilonis, Juncus ensifolius, and Carex stipata. Within the perimeter of the Hayman Fire (2002), though this area mapped as low intensity; vegetated only on the creek, forest not re-established away from creek. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (KHD^‡ )

Coll. No. 3439.3, Carex leptalea.

Field Notes: Coll. No. 3440, 2 Jul 2025.

Name List: Potentilla hippiana var. hippiana

3440. Potentilla hippiana Lehm. var. hippiana. Leaves pinnate, tomentose both sides. Along horse/cow trail above the left bank of the creek, about 520 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2110,-105.3498,WGS 1984) Mature Douglas fir and ponderosa pine forest, with Achillea millefolium, Erigeron speciosa, Gaillardia aristata, Monarda fistulosa, Rubus idaeus, Verbascum thapsus, and Corallorhiza maculata. Within the perimeter of the Hayman Fire (2002), though this area mapped as unburned. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (FLD )

Field Notes: Coll. No. 3441, 2 Jul 2025.

Name List: Linaria vulgaris

3441. Linaria vulgaris Mill. Weed: CO DofA, List: B. Small colony of 20 plants. Along horse/cow trail above the left bank of the creek, about 350 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2101,-105.3483,WGS 1984) Mixed down and mature live Douglas fir and ponderosa pine, with Cryptantha virgata, Oenothera villosa, and Ipomopsis aggregata. Within the perimeter of the Hayman Fire (2002), While this area is mapped as unburned, there are burned trees and down logs here. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (CAS , COLO , UCR )

Coll. No. 3441, Linaria vulgaris.

Field Notes: Coll. No. 3442, 2 Jul 2025.

Name List: Ipomopsis aggregata ssp. collina

3442. Ipomopsis aggregata (Pursh) V.E. Grant ssp. collina (Greene) Wilken & Allard. Along horse/cow trail above the left bank of the creek, about 325 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2098,-105.3483,WGS 1984) Mixed down and mature live Douglas fir and ponderosa pine, with Cryptantha virgata, Oenothera villosa, and Linaria vulgaris. Within the perimeter of the Hayman Fire (2002), While this area is mapped as unburned, there are burned trees and down logs here. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (CAS , FLD )

Field Notes: Coll. No. 3443, 2 Jul 2025.

Name List: Oenothera coronopifolia

3443. Oenothera coronopifolia Torr. & A. Gray. Flowers white, fading pink. Along horse/cow trail above the left bank of the creek, about 100 m. upstream of the F. R. 211 crossing of North Twin Creek, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2088,-105.3459,WGS 1984) Mature Douglas fir and ponderosa pine forest, with Oxytropis lambertii and Penstemon virens nearby. Within the perimeter of the Hayman Fire (2002); this area is mapped as low intensity. 7/2/2025 North Twin Creek, Jefferson County, Colorado. (FLD , UCR )

Coll. No. 3443, Oenothera coronopifolia.

Field Notes: Obs. No. 4231, Coll. No. 3444, 4 July 2025.

Name List: Avena fatua

3444. Avena fatua L. Callus bearded. Parkway native garden at 420 Arapahoe, Golden, about 920 m. northwest of the GNIS location of Golden. (39.7614,-105.2287,WGS 1984) First seen in 2025 in an established native garden that was about 10 years in age. Nearest other Jefferson County collections: Kipling/38th, Rocky Flats. iNaturalist: 295156093. 7/4/2025 Golden, Jefferson County, Colorado. (Undist. )

Obs. No. 4231, Avena fatua.

Field Notes: Coll. No. 3445, 7 Jul 2025.

Name List: Tanacetum parthenium

3445. Tanacetum parthenium (L.) Sch.Bip. Naturalized. Right bank of Tucker Gulch in Norman D. Park, just upstream of North Ford Street,1.92 km. north northwest of the GNIS location of Golden. (39.7710,-105.2313,WGS 1984) In an opening between trees lining the south side of the creek: Populus deltoides ssp. monilifera, Acer negundo, and Ulmus pumilus. EDDMaps: 13517275. 7/7/2025 Tucker Gulch (lower), Jefferson County, Colorado. (COLO , CS , JCOSs.n. , KHD )

Coll. No. 3445, Tanacetum parthenium.

Field Notes: Coll. No. 3446, 7 Jul 2025.

Name List: Solanum dulcamara

3446. Solanum dulcamara L. Right bank of the Welch Ditch in the western corner of Cottonwood Open Space, 1.63 km. south of the GNIS location of Golden. (39.7420,-105.2137,WGS 1984) Several patches on the overgrown bank of ditch. Cottonwood Open Space, formerly named Cottonwood Natural Area, was designated by the City of Golden in July 2025. 7/7/2025 Cottonwood Open Space (City of Golden), Jefferson County, Colorado. (FLD , KHD , OBI , REGIS )

Coll. No. 3446, Solanum dulcamara.

Field Notes: Coll. No. 3447, 7 Jul 2025.

Name List: Krascheninnikovia lanata

3447. Krascheninnikovia lanata (Pursh) A. D. J. Meeuse & Smit. Mostly staminate plants here. Western part of open space above the Welch Ditch, 1.09 km. southwest of the GNIS location of Golden. (39.7489,-105.2304,WGS 1984) Mixed-grass prairie with Ericameria nauseosa varieties nauseosa and graveolens. Designated a City of Golden open space in July 2025. 7/7/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (COLO , CS , FLD , REGIS )

Field Notes: Coll. No. 3448, 10 Jul 2025..

Name List: Solanum elaeagnifolium

3448. Solanum elaeagnifolium Cav. Fruit persistent. Berm just to the southeast of the City of Golden water tank above Rimrock Drive, southwest corner of South Table Mountain, 2.16 km. southeast of the GNIS location of Golden. (39.7452,-105.1998,WGS 1984) With Rhus trilobata, Ambrosia psilostachya, Ericameria nauseosa, vars. nauseosa and graveolens, Alyssum simplex, Physalis hederifolia, Opuntia macrorhiza, Agropyron cristatum, and Bromus tectorum, Located per Loraine Yeatts' iNaturalist observation no. 258416989. 7/10/2025 South Table Mountain, Jefferson County, Colorado. (CAS , FLD , JCOSs.n. , KHD , OBI , UCR )

Coll. No. 3448, Solanum elaeagnifolium.

Field Notes: Coll. No. 3449, 10 Jul 2025..

Name List: Physalis hederifolia

3449. Physalis hederifolia A. Gray. Berm just to the southeast of the City of Golden water tank above Rimrock Drive, southwest corner of South Table Mountain, 2.16 km. southeast of the GNIS location of Golden. (39.7452,-105.1998,WGS 1984) With Rhus trilobata, Ambrosia psilostachya, Ericameria nauseosa, vars. nauseosa and graveolens, Alyssum simplex, Solanum elaeagnifolium, Opuntia macrorhiza, Agropyron cristatum, and Bromus tectorum. 7/10/2025 South Table Mountain, Jefferson County, Colorado. (CS , FLD , UCR )

Field Notes: Coll. No. 3450, 16 Jul 2025.

Name List: Agrostis gigantea

3450. Agrostis gigantea Roth. Western side of Parfet Open Space, about mid-slope between Welch Ditch and the houses, 1.15 km. southwest of the GNIS location of Golden. (39.7485,-105.2309,WGS 1984) Small swale, with Ambrosia psilostachya, Linum sp., Bromus inermis, and Festuca sp. Designated a City of Golden Open Space in July 2025. 7/16/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (CAS , FLD , KHD )

Field Notes: Coll. No. 3451, 16 Jul 2025.

Name List: Juncus torreyi

3451. Juncus torreyi Coville. Normal appearing inflorescence on about half of the stems; the other half greatly deformed, likely a gall caused by Livia sp. Western edge of Parfet Open Space, in still water just below a spring, 1.16 km. southwest of the GNIS location of Golden. (39.7486,-105.2312,WGS 1984) Also collected here: Clematis ligusticifolia. Designated a City of Golden Open Space in July 2025. iNaturalist: 298436857. 7/16/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (JCOSs.n. , JCOSs.n. , KHD , OBI , UCR )

Coll. No. 3451, Juncus torreyi with gall in inflorescence.

Coll. No. 3451, Juncus torreyi.

Coll. No. 3451, Juncus torreyi without gall in inflorescence.

Field Notes: Coll. No. 3452, 16 Jul 2025.

Name List: Clematis ligusticifolia

3452. Clematis ligusticifolia Nutt. Western edge of Parfet Open Space, growing around a small perennial spring, 1.16 km. southwest of the GNIS location of Golden. (39.7486,-105.2312,WGS 1984) Also collected here: Juncus torreyi. Designated a City of Golden Open Space in July 2025. 7/16/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (CS , EIU , FLD , REGIS )

Field Notes: Coll. No. 3453, 20 Jul 2025.

Name List: Berteroa incana

3453. Berteroa incana (L.) DC. In the bottom of the dry wash (Cressman Gulch) that runs along the southwest side of the open space, 3.23 km. northwest of the GNIS location of Golden. (39.7813,-105.2385,WGS 1984) This parcel designated the North Golden Hogback Open Space in July 2025. 7/20/2025 North Golden Hogback Open Space (City of Golden), Jefferson County, Colorado. (FLD , OBI , REGIS )

Field Notes: Coll. No. 3454, 20 Jul 2025.

Name List: Poa compressa

3454. Poa compressa L. In the bottom of the dry wash (Cressman Gulch) that runs along the southwest side of the open space, 3.27 km. northwest of the GNIS location of Golden. (39.7816,-105.2387,WGS 1984) Damp soil, just below storm drain outfall, with Bouteloua gracilis and Bromus japonicus. This parcel designated the North Golden Hogback Open Space in July 2025. 7/20/2025 North Golden Hogback Open Space (City of Golden), Jefferson County, Colorado. (FLD , OBI , UCR )

Coll. No. 3454, Poa compressa.

Field Notes: Coll. No. 3455, 20 Jul 2025.

Name List: Solidago missouriensis

3455. Solidago missouriensis Nutt. On the lowest stream terrace of a dry wash (Cressman Gulch) that runs along the southwest side of the open space, 3.30 km. northwest of the GNIS location of Golden. (39.7819,-105.2389,WGS 1984) With an Opuntia (non-native), Euphorbia esula, Pediomelum tenuiflorum, Rumex crispus, and Bromus inermis. This parcel designated the North Golden Hogback Open Space in July 2025. 7/20/2025 North Golden Hogback Open Space (City of Golden), Jefferson County, Colorado. (CAS , FLD , OBI , UCR )

Field Notes: Coll. No. 3456, 20 Jul 2025.

Name List: Salix irrorata

3456. Salix irrorata Andersson. Multi-trunk, bark light gray; pruinose twigs on previous years' growth and not on current year's growth. On the lowest stream terrace of a dry wash (Cressman Gulch) that runs along the southwest side of the open space, 3.35 km. northwest of the GNIS location of Golden. (39.7823,-105.2392,WGS 1984) This parcel designated the North Golden Hogback Open Space in July 2025. 7/20/2025 North Golden Hogback Open Space (City of Golden), Jefferson County, Colorado. (CS , KHD , OBI )

Coll. No. 3456, Salix irrorata.

Field Notes: Coll. No. 3457, 20 Jul 2025.

Name List: Thelesperma megapotamicum

3457. Thelesperma megapotamicum (Spreng.) Kuntze. On an upper stream terrace of a dry wash (Cressman Gulch) that runs along the southwest side of the open space, 3.35 km. northwest of the GNIS location of Golden. (39.7823,-105.2392,WGS 1984) With Artemisia frigida, Lupinus argenteus, and Pediomelum tenuiflorum. This parcel designated the North Golden Hogback Open Space in July 2025. 7/20/2025 North Golden Hogback Open Space (City of Golden), Jefferson County, Colorado. (CAS , FLD , UCR )

Field Notes: Coll. No. 3458, 21 Jul 2025.

Name List: Koeleria macrantha

3458. Koeleria macrantha (Ledeb.) Schult. Along a horse/cow trail on the low ridge southwest of North Twin Creek, 315 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2091,-105.3485,WGS 1984) Open forest with Pinus ponderosa, Pseudotsuga douglasii, Antennaria sp., Artemisia frigida, and Arctostaphylos uva-ursi 7/21/2025 North Twin Creek, Jefferson County, Colorado. (CAS , CS , FLD )

Field Notes: Coll. No. 3458.1, 21 Jul 2025.

Name List: Pseudoroegneria spicata

3458.1 Pseudoroegneria spicata (Pursh) A. L�ve. Rhizomatous, 2-sided spike, 1 spikelet per node, little overlap, lemma awn divergent when dry. Along a horse/cow trail on the low ridge southwest of North Twin Creek, 315 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2091,-105.3485,WGS 1984) Open forest with Pinus ponderosa, Pseudotsuga menziesii, Antennaria sp., Artemisia frigida, Arctostaphylos uva-ursi, and Koeleria macrantha. 7/21/2025 North Twin Creek, Jefferson County, Colorado. (KHD )

Coll. No. 3458.1, Pseudoroegneria spicata.

Field Notes: Coll. No. 3459, 21 Jul 2025.

Name List: Allium cernuum

3459. Allium cernuum Roth. Along a fading horse/cow trail on the ridge southwest of North Twin Creek, about 375 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2095,-105.3490,WGS 1984) Openings in Douglas fir and ponderosa pine woodland. Within the perimeter of the Hayman Fire (2002). This area mapped as unburned though there are some charred stumps and down logs. 7/21/2025 North Twin Creek, Jefferson County, Colorado. (COLO , EIU , FLD )

Field Notes: Coll. No. 3460, 21 Jul 2025.

Name List: Achillea millefolium

3460. Achillea millefolium L. Along a fading horse/cow trail on the ridge southwest of North Twin Creek, about 435 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2099,-105.3496,WGS 1984) Open ponderosa pine and Douglas fir forest, with Juniperus communis, Apocynum androsaemifolium, Achillea millefolium, Arctostaphylos uva-ursi and Elymus elymoides. Within the perimeter of the Hayman Fire (2002). This area mapped as unburned though there are some charred stumps and down logs. 7/21/2025 North Twin Creek, Jefferson County, Colorado. (CAS , FLD , OBI )

Field Notes: Coll. No. 3461, 21 Jul 2025.

Name List: Arctostaphylos uva-ursi

3461. Arctostaphylos uva-ursi (L.) Sprengel. Along a fading horse/cow trail on the ridge southwest of North Twin Creek, about 435 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2099,-105.3496,WGS 1984) At the base of small Douglas fir in open ponderosa pine and Douglas fir forest, with Juniperus communis, Achillea millefolium, Apocynum androsaemifolium, Achillea millefolium, and Elymus elymoides. Within the perimeter of the Hayman Fire (2002). This area mapped as unburned though there are some charred stumps and down logs. 7/21/2025 North Twin Creek, Jefferson County, Colorado. (FLD )

Field Notes: Coll. No. 3461.1, Androsace septentrionalis..

Name List: Androsace septentrionalis

3461.1 Androsace septentrionalis L. Along a fading horse/cow trail on the ridge southwest of North Twin Creek, about 435 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2099,-105.3496,WGS 1984) At the base of small Douglas fir in open ponderosa pine and Douglas fir forest, with Juniperus communis, Achillea millefolium, Apocynum androsaemifolium, Achillea millefolium, and Elymus elymoides. Within the perimeter of the Hayman Fire (2002). This area mapped as unburned though there are some charred stumps and down logs. 7/21/2025 North Twin Creek, Jefferson County, Colorado. (FLD )

Field Notes: Coll. No. 3462, 21 Jul 2025.

Name List: Apocynum androsaemifolium

3462. Apocynum androsaemifolium L. Leaves drooping. Many small plants here, but very few with flowers. Along a fading horse/cow trail on the ridge southwest of North Twin Creek, about 435 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2099,-105.3496,WGS 1984) Open ponderosa pine and Douglas fir forest, with Juniperus communis, Achillea millefolium, Arctostaphylos uva-ursi, Androsace septentrionalis, and Elymus elymoides. Within the perimeter of the Hayman Fire (2002). This area mapped as unburned though there are some charred stumps and down logs. 7/21/2025 North Twin Creek, Jefferson County, Colorado. (KHD , OBI )

Coll. No. 3462, Apocynum androsaemifolium.

Field Notes: Coll. No. 3463, 21 Jul 2025.

Name List: Elymus elymoides

3463. Elymus elymoides (Raf.) Swezey. Along a fading horse/cow trail on the ridge southwest of North Twin Creek, about 435 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.6 km. southwest of Deckers. (39.2099,-105.3497,WGS 1984) Open ponderosa pine and Douglas fir forest, with Juniperus communis, Achillea millefolium, Arctostaphylos uva-ursi, Androsace septentrionalis, and Apocynum androsaemifolium. Within the perimeter of the Hayman Fire (2002). This area mapped as unburned though there are some charred stumps and down logs. 7/21/2025 North Twin Creek, Jefferson County, Colorado. (CAS , FLD , REGIS )

Field Notes: Coll. No. 3464, 21 Jul 2025.

Name List: Rubus idaeus var. strigosus

3464. Rubus idaeus L. var. strigosus (Michx.) Maxim. In a forest glade where two branches join North Twin Creek, about 610 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.7 km. southwest of Deckers. (39.2114,-105.3508,WGS 1984) Small patch in mature Douglas fir and ponderosa pine forest, with Achillea millefolium, Cirsium arvense, Symphyotrichum sp., Gaillardia aristata, Monarda fistulosa, Verbascum thapsus, and Bromus porteri. This area mapped as unburned within the perimeter of the Hayman Fire (2002). 7/21/2025 North Twin Creek, Jefferson County, Colorado. (KHD , OBI , UCR )

Field Notes: Coll. No. 3465, 21 Jul 2025.

Name List: Erigeron subtrinervis

3465. Erigeron subtrinervis Rydb. ex Porter & Britton. In a forest glade where two branches join North Twin Creek, about 610 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.7 km. southwest of Deckers. (39.2114,-105.3508,WGS 1984) Small patch in mature Douglas fir and ponderosa pine forest, with Achillea millefolium, Cirsium arvense, Erigeron speciosus, Gaillardia aristata, Monarda fistulosa, Verbascum thapsus, and Bromus porteri. This area mapped as unburned within the perimeter of the Hayman Fire (2002). 7/21/2025 North Twin Creek, Jefferson County, Colorado. (CAS , COLO , CS )

Comments: 1/7/2026, Coll. No. 3465 21 July 2025, characters observed: Perennial, to 40 cm.; Stem strigose, distally stipitate-glandular; Leaves, basal withered, cauline, alternate, sessile, bases auriculate, 56 mm. × 16 mm. wide, length 3.5× width, strigose, eglandular, margins ciliate, tips acute, not spinulose; Involucre, 5 mm. × 10 mm. wide; Phyllaries, in 3 series, ±equal, 5 mm. × 0.8 mm. wide, outer green, inner chartaceous, outer hairy and minutely stipitate glandular; Receptacle, epaleate; Rays, tube 3 mm. + blade 8 mm. × 0.8 mm. wide, blue; Disk flowers, many, tube 3 mm. + lobes 0.3 mm., yellow; Pappus, 2 series, outer low crown 0.2 mm., inner bristles 2.5 mm.;

Field Notes: Coll. No. 3466, 21 Jul 2025.

Name List: Heterotheca foliosa

3466. Heterotheca foliosa (Nutt.) Shinners. In a forest glade where two branches join North Twin Creek, about 670 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.7 km. southwest of Deckers. (39.2121,-105.3509,WGS 1984) Forest floor, tall ponderosa pine and Douglas fir that appear to have survived the Hayman Fire (2002) 7/21/2025 North Twin Creek, Jefferson County, Colorado. (CAS , CS , EIU , FLD )

Field Notes: Coll. No. 3467, 21 Jul 2025.

Name List: Bromus porteri

3467. Bromus porteri (J.M. Coult.) Nash. In a forest glade where two branches join North Twin Creek, about 700 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.7 km. southwest of Deckers. (39.2124,-105.3511,WGS 1984) Forest floor among tall conifers, mostly ponderosa pine, with Bromus tectorum. Within the perimeter of the Hayman Fire (2002), fire intensity mapped as low at this location. 7/21/2025 North Twin Creek, Jefferson County, Colorado. (CAS , EIU , KHD , REGIS )

Field Notes: Coll. No. 3468, 21 Jul 2025.

Name List: Anticlea elegans

3468. Anticlea elegans (Pursh) Rydb. In a forest glade where two branches join North Twin Creek, about 700 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.7 km. southwest of Deckers. (39.2130,-105.3521,WGS 1984) Shaded forest of mostly mature Douglas fir, forest floor with aspen, roses, and geranium; also collected here: Heracleum maximum. Within the perimeter of the Hayman Fire (2002), with fire intensity mapped as low at this location. 7/21/2025 North Twin Creek, Jefferson County, Colorado. (CAS , OBI , UCR )

Field Notes: Coll. No. 3469, 21 Jul 2025.

Name List: Heracleum maximum

3469. Heracleum maximum Bartr. In a forest glade where two branches join North Twin Creek, about 700 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.7 km. southwest of Deckers. (39.2130,-105.3521,WGS 1984) Shaded forest of mostly mature Douglas fir, forest floor with aspen, roses, and geraniums; also collected here: Anticlea elegans. Within the perimeter of the Hayman Fire (2002), with fire intensity mapped as low at this location. 7/21/2025 North Twin Creek, Jefferson County, Colorado. (CAS , OBI , UCR )

Field Notes: Coll. No. 3470, 21 Jul 2025.

Name List: Holodiscus discolor var. microphyllus

3470. Holodiscus discolor (Pursh) Maxim. var. microphyllus (Rydb.) Jeps. Late in bloom. Base of boulder near where two branches join North Twin Creek, about 860 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.7 km. southwest of Deckers. (39.2129,-105.3529,WGS 1984) Mature, burned stumps and down trunks, and immature ponderosa pine and Douglas fir, with some aspens. Within the perimeter of the Hayman Fire (2002), mapping shows this location on the boundary between unburned and low intensity fire. Coordinates estimated from nearby collections. Determination per Ackerfield (2022). 7/21/2025 North Twin Creek, Jefferson County, Colorado. (CAS , KHD , OBI , UCR )

View across North Twin Creek just above the forks.

Coll. No. 3470, Holodiscus discolor var. microphyllus.

Field Notes: Coll. No. 3471, 21 Jul 2025.

Name List: Solidago missouriensis

3471. Solidago missouriensis Nutt. Beside boulder near where two branches join North Twin Creek, about 860 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.7 km. southwest of Deckers. (39.2129,-105.3530,WGS 1984) Mature, burned stumps and down trunks, and immature ponderosa pine and Douglas fir, with some aspens. Within the perimeter of the Hayman Fire (2002), mapping shows this location on the boundary between unburned and low intensity fire. 7/31/2025 North Twin Creek, Jefferson County, Colorado. (CAS , KHD , UCR )

Field Notes: Coll. No. 3472, 21 Jul 2025.

Name List: Arctostaphylos uva-ursi

3472. Arctostaphylos uva-ursi (L.) Sprengel. Slope south of North Twin Creek, about 815 m. northwest of the crossing of North Twin Creek by F. R. 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.7 km. southwest of Deckers. (39.2122,-105.3530,WGS 1984) Small trees in an open ponderosa pine forest. This area mapped as unburned within the perimeter of the Hayman Fire (2002). 7/21/2025 North Twin Creek, Jefferson County, Colorado. (CS , REGIS )

Field Notes: Coll. No. 3473, 25 Jul 2025.

Name List: Juniperus scopulorum

3473. Juniperus scopulorum Sarg. Northern portion of the Tony Grampsas Memorial Sports Complex, northeast slope of small alluvial hill, southeast side of North Table Mountain, 4.02 km. (geodesic) northeast of the GNIS location of Golden. (39.7811,-105.1878,WGS 1984) Sole shrub on north slope, with Artemisia dracunculus, Mirabilis linearis, Eriogonum alatum, and Elymus elymoides. This area was designated a City of Golden open space in 2025. 7/25/2025 Grampsas North Open Space (City of Golden), Jefferson County, Colorado. (KHD )

Coll. No. 3473, Juniperis scopulorum.

Comments: 11/2/2025, Coll. No. 3473, characters observed: ±upright, with whip-like branches, leaves, 2 kinds, overlap, very little <¼, margins, entire, gland < distance to apex; cones, terminal, all of one size (implies cones maturing in one year).

Field Notes: Coll. No. 3474, 25 Jul 2025.

Name List: Physalis longifolia

3474. Physalis longifolia Nutt. Northern portion of the Tony Grampsas Memorial Sports Complex, against the north fence, 4.23 km. northeast of the GNIS location of Golden. (39.7835,-105.1876,WGS 1984) Also here or nearby: Cirsium arvense, Onopordum acanthium, Symphyotrichum ericoides, Nepeta cataria, Elaeagnus angustifolia, Ailanthus altissima, and Bromus inermis. This area was designated a City of Golden open space in 2025. 7/25/2025 Grampsas North Open Space (City of Golden), Jefferson County, Colorado. (d: COLO(147) , d: CS(148) , d: REGIS(150) , CAS )

Coll. No. 3474, Physalis longifolia.

Field Notes: Coll. No. 3475, 25 Jul 2025.

Name List: Physalis hederifolia

3475. Physalis hederifolia A. Gray. Approximate center of the open space, northern portion of the Tony Grampsas Memorial Sports Complex, 4.11 km. (geodesic) northeast of the GNIS location of Golden. (39.7822,-105.1877,WGS 1984) With Ambrosia psilostachya, many Ericameria nauseosa var. graveolens, Chenopodium album, and Bromus japonicus. This area was designated a City of Golden open space in 2025. 7/25/2025 Grampsas North Open Space (City of Golden), Jefferson County, Colorado. (d: COLO(147) , d: REGIS(150) , CAS )

Coll. No. 3475, Physalis hederifolia.

Field Notes: Coll. No. 3476, 28 Jul 2025.

Name List: Eriogonum arcuatum var. arcuatum

3476. Eriogonum arcuatum Greene, Pittonia. 4: 319. 1901. var. arcuatum. North side of Coal Creek, south-facing bank between Colorado State Highway 72 “Coal Creek Canyon Road” and the creek, 1.47 km. northwest of Coal Creek Fire Station #3, 1.51 km. north northwest of Golden. (39.8794,-105.2928,WGS 1984) Openings in Pinus ponderosa woodland, with Artemisia ludoviciana, Lactuca sp., Penstemon virens, Cercocarpus montanus, Acer glabrum, Bouteloua gracilis, and Koeleria macrantha, 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: COLO(147) , d: REGIS(150) , d: FLD(151) , JCOSs.n. )

Coll. No. 3476, Eriogonum arcuatum var. arcuatum.

Field Notes: Coll. No. 3477, 28 Jul 2025.

Name List: Bouteloua gracilis

3477. Bouteloua gracilis (Kunth) Lag. ex Griffiths. North side of Coal Creek, south-facing bank between Colorado State Highway 72 “Coal Creek Canyon Road” and the creek, 1.47 km. northwest of Coal Creek Fire Station #3, 1.51 km. north northwest of Golden. (39.8794,-105.2928,WGS 1984) Openings in Pinus ponderosa woodland, with Artemisia ludoviciana, Lactuca sp., Penstemon virens, Eriogonum arcuatum, Cercocarpus montanus, Acer glabrum,, and Koeleria macrantha, 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: CAS(146) , d: COLO(147) , d: FLD(151) , JCOSs.n. , OBI )

Field Notes: Coll. No. 3478, 28 Jul 2025.

Name List: Lactuca serriola

3478. Lactuca serriola L. Leaf margin and abaxial midrib prickly; flowers yellow, cypselae 4-6 nerves per face. North side of Coal Creek, south-facing bank between Colorado State Highway 72 “Coal Creek Canyon Road” and the creek, 1.47 km. northwest of Coal Creek Fire Station #3, 1.51 km. north northwest of Golden. (39.8795,-105.2929,WGS 1984) Openings in Pinus ponderosa woodland, with Artemisia ludoviciana, Penstemon virens, Eriogonum arcuatum, Cercocarpus montanus, Acer glabrum, Bouteloua gracilis, and Koeleria macrantha, 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (FLD , JCOSs.n. )

Coll. No. 3478, Lactuca serriola.

Field Notes: Coll. No. 3479, 28 Jul 2025.

Name List: Pseudognaphalium macounii

3479. Pseudognaphalium macounii (Greene) Kartesz. North side of Coal Creek, stream terrace between Colorado State Highway 72 “Coal Creek Canyon Road” and the creek, 1.77 km. northwest of Coal Creek Fire Station #3, 15.1 km. north northwest of Golden. (39.8798,-105.2938,WGS 1984) Ponderosa pine forest floor. 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: CS(148) , d: REGIS(150) , d: FLD(151) , JCOS )

Field Notes: Coll. No. 3480, 28 Jul 2025.

Name List: Lysimachia ciliata

3480. Lysimachia ciliata L. Flowers yellow. Right bank of Coal Creek, below Highway 72 “Coal Creek Canyon Road” 1.60 km. northwest of Coal Creek Fire Station #3, 15.2 km. north northwest of Golden. (39.8800,-105.2942,WGS 1984) Base of willow on bank of creek. 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: OBI(144) , d: KHD(143) , d: UCR(145) , JCOSs.n. )

Field Notes: Coll. No. 3480.1, 28 Jul 2025.

Name List: Cirsium arvense

3480.1 Cirsium arvense (L.) Scop. Weed: CO DofA, List: B. Right bank of Coal Creek, below Highway 72 “Coal Creek Canyon Road” 1.60 km. northwest of Coal Creek Fire Station #3, 15.2 km. north northwest of Golden. (39.8800,-105.2942,WGS 1984) Among willows and boulders along creek. 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (JCOSs.n. )

Field Notes: Coll. No. 3481, 28 Jul 2025.

Name List: Solidago gigantea

3481. Solidago gigantea Aiton. Left bank of Coal Creek, below Highway 72 “Coal Creek Canyon Road” 1.52 km. northwest of Coal Creek Fire Station #3, 15.0 km. north northwest of Golden. (39.8788,-105.2939,WGS 1984) In willows and cottonwoods on left bank of creek 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: CAS(146) , d: REGIS(150) , d: FLD(151) , JCOS )

Field Notes: Coll. No. 3482, 28 Jul 2025.

Name List: Schoenoplectus tabernaemontani

3482. Schoenoplectus tabernaemontani (C.C.Gmel.) Palla. Left bank of Coal Creek, below Highway 72 “Coal Creek Canyon Road” 1.50 km. northwest of Coal Creek Fire Station #3, 15.0 km. north northwest of Golden. (39.8786,-105.2938,WGS 1984) 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: CAS(146) , d: COLO(147) , d: UCR(145) , JCOSs.n. )

Field Notes: Coll. No. 3483, 28 Jul 2025.

Name List: Silene latifolia

3483. Silene latifolia Poir. Left bank of Coal Creek, below Highway 72 “Coal Creek Canyon Road” 1.50 km. northwest of Coal Creek Fire Station #3, 15.0 km. north northwest of Golden. (39.8786,-105.2937,WGS 1984) Gravel bench with Arctium minus, Cichorium intybus, Pericome caudata, Campanula rapunculoides, Oenothera villosa, and Bromus inermis This area looks like it was scoured out by a flood, perhaps that of September 2013. 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: CAS(146) , d: EIU(149) , d: FLD(151) , JCOSs.n. )

Field Notes: Coll. No. 3484, 28 Jul 2025.

Name List: Campanula rapunculoides

3484. Campanula rapunculoides L. Left bank of Coal Creek, below Highway 72 “Coal Creek Canyon Road” 1.49 km. northwest of Coal Creek Fire Station #3, 15.0 km. north northwest of Golden. (39.8787,-105.2936,WGS 1984) In a thicket of Salix exigua on bank of creek. EDDMaps: 13437903. 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: KHD(143) , JCOSs.n. )

Coll. No. 3484, Campanula rapunculoides.

Field Notes: Coll. No. 3485, 28 Jul 2025.

Name List: Bromus ciliatus

3485. Bromus ciliatus L. Mid-slope below Highway 72 “Coal Creek Canyon Road” and above Coal Creek, 1.41 km. northwest of Coal Creek Fire Station #3, 15.0 km. north northwest of Golden. (39.8788,-105.2924,WGS 1984) Hillslope with ponderosa pines. 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (JCOSs.n. , KHD )

Comments: 11/22/2025, B. porteri is not commonly collected in this area. The only other collection within 15 km. is a Tim Hogan collection in Boulder County, Panther Canyon.

Field Notes: Coll. No. 3486, 28 Jul 2025.

Name List: Daucus carota

3486. Daucus carota L. Roadside ditch along Colorado Highway 72 “Coal Creek Canyon Road,” 2.15 km. northwest of Coal Creek Fire Station #3, 15.6 km. north northwest of Golden. (39.8822,-105.2999,WGS 1984) 7/28/2025 Coal Creek Canyon Study Area, Lacey Parcel, Jefferson County, Colorado. (d: KHD(143) , d: CS(148) , d: REGIS(150) , JCOSs.n. )

Coll.No. 3485, Daucus carota.

Field Notes: Coll. No. 3487, 15 Aug 2025.

Name List: Krascheninnikovia lanata

3487. Krascheninnikovia lanata (Pursh) A. D. J. Meeuse & Smit. Staminate and pistillate plants. North-facing slope between Parfet Estates and US Highway 6, about mid-slope between the Welch Ditch and the houses, 1.1km. (geodesic) southwest of the GNIS location of Golden. (39.7488,-105.2308,WGS 1984) Also here: Juniperus virginiana, Ericameria nauseosa var. nauseosa, Gutierrezia sarothrae, Elaeagnus angustifolia, Oenothera howardii, Andropogon gerardii, Bouteloua curtipendula, and Nassela viridula. This parcel was designated a City of Golden open space in 2025. 8/15/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (d: OBI(144) , d: UCR(145) , d: CAS(146) , KHD )

Coll. No. 3487, Krascheninnikovia lanata.

Field Notes: Coll. No. 3488, 18 Aug 2025.

Name List: Artemisia ludoviciana ssp. incompta

3488. Artemisia ludoviciana Nutt. ssp. incompta (Nutt.) D. D. Keck. Small plants; leaves deeply parted. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2102,-105.3440,WGS 1984) In grus with Pseudotsuga menziesii, Artemisia frigida, Ribes cereum, and Cercocarpus montanus. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: EIU(149) , d: FLD(151) , d: REGIS(150) , CAS )

Coll. No. 3488, Artemisia ludoviciana var. incompta.

Field Notes: Coll. No. 3489, 18 Aug 2025.

Name List: Amaranthus powellii

3489. Amaranthus powellii S. Watson. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2102,-105.3441,WGS 1984) In grus with Pseudotsuga menziesii, Artemisia frigida, A. ludoviciana var. incompta, Ribes cereum, and Cercocarpus montanus. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: OBI(144) , d: UCR(145) , d: REGIS(150) , KHD )

Coll. No. 3489, Amaranthus powellii.

Field Notes: Coll. No. 3489.1, 18 Aug 2025.

Name List: Dieteria bigelovii var. bigelovii

3489.1 Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartman var. bigelovii. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2102,-105.3441,WGS 1984) In grus with Pseudotsuga menziesii, Amaranthus powellii, Artemisia frigida, Ribes cereum, and Cercocarpus montanus. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: CS(148) , d: FLD(151) , CAS )

Coll. No. 3489.1, Dieteria bigelovii var. bigelovii.

Field Notes: Coll. No. 3490, 18 Aug 2025.

Name List: Pseudognaphalium macounii

3490. Pseudognaphalium macounii (Greene) Kartesz. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2102,-105.3451,WGS 1984) In bowl of grus between outctops of Pikes Peak granite, with Juniperus communis, Pseudotsuga menziesii, Aletes anisatus, Paronychia jamesii, Ribes cereum, Jamesia americana, and Muhlenbergia montana. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: CAS(146) , d: COLO(147) , OBI )

Coll. No. 3490, Pseudognaphalium macounii

Miscellaneous Notes on the Colorado Flora: Aletes anisatus. Field Notes: Coll. No. 3491, 18 Aug 2025.

Name List: Aletes anisatus

3491. Aletes anisatus (A. Gray) W. L. Theob. & C. C. Tseng. Strong odor of anise when collected; in fruit, well past flowering in mid-August. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2103,-105.3451,WGS 1984) In bowl of grus between outctops of Pikes Peak granite, with Juniperus communis, Pseudotsuga menziesii, Pseudognaphalium macounii, Paronychia jamesii, Ribes cereum, Jamesia americana, and Muhlenbergia montana. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: OBI(144) , d: UCR(145) , d: CS(148) , KHD )

Bowl of grus with Coll. No. 3491, Aletes anisatus.

Coll. No. 3491, Aletes anisatus.

Field Notes: Coll. No. 3492, 18 Aug 2025.

Name List: Muhlenbergia montana

3492. Muhlenbergia montana (Nutt.) Hitchc. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2102,-105.3451,WGS 1984) In bowl of grus between outctops of Pikes Peak granite, with Juniperus communis, Pseudotsuga menziesii, Aletes anisatus, Paronychia jamesii, Ribes cereum, and Jamesia americana. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: CAS(146) , d: FLD(151) , d: EIU(149) , UCR )

Field Notes: Coll. No. 3493, 18 Aug 2025.

Name List: Mentzelia speciosa

3493. Mentzelia speciosa Osterh. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2106,-105.3449,WGS 1984) In loose, deep grus with: Pinus ponderosa, Pseudotsuga menziesii, Artemisia ludoviciana, Phacelia sp., Ribes cereum, and Cercocarpus montanus. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: OBI(144) , d: UCR(145) , d: CAS(146) , KHD )

Coll. No. 3493, Mentzelia speciosa.

Coll. No. 3492, Mentzelia speciosa.

Field Notes: Coll. No. 3494, 18 Aug 2025.

Name List: Phacelia hastata

3494. Phacelia hastata Douglas ex Lehm. Multiple stems from caudex. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2106,-105.3449,WGS 1984) In loose, deep grus with: Pinus ponderosa, Pseudotsuga menziesii, Artemisia ludoviciana, Mentzelia speciosa, Phacelia sp., Ribes cereum, and Cercocarpus montanus. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (KHD )

Coll. No. 3494, Phacelia hastata.

Field Notes: Coll. No. 3495, 18 Aug 2025.

Name List: Hymenothrix dissecta

3495. Hymenothrix dissecta (A. Gray) B. G. Baldwin. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2112,-105.3460,WGS 1984) This area burned in the Hayman Fire of 2002. In a pool of grus between outcrops of Pikes Peak granite. With Pinus ponderosa, Achillea millefolium, Cryptantha virgata, Campanula rotundifolia, Arctostaphylos uva-ursi, Jamesia americana, Cercocarpus montanus, Holodiscus dumosa, Rubus deliciousus, Verbascum thapsus, and Bouteloua gracilis. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: REGIS(150) , d: FLD(151) , d: CS(148) , CAS )

Coll. No. 3495, Hymenothrix dissecta.

Field Notes: Coll. No. 3496, 18 Aug 2025.

Name List: Liatris punctata

3496. Liatris punctata Hook. Phyllaries erect, acuminate to acute, ciliate; pappus plumose. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2112,-105.3458,WGS 1984) With Pinus ponderosa, Aletes anisatus, Achillea millefolium, Cryptantha virgata, Arctostaphylos uva-ursi, Jamesia americana, Cercocarpus montanus, Holodiscus dumosa, Rubus deliciosus, Verbascum thapsus, and Bouteloua gracilis. In grus adjacent to outcrops of Pikes Peak granite. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: CS(148) , d: EIU(149) , d: FLD(151) , CAS )

Field Notes: Coll. No. 3497, 18 Aug 2025.

Name List: Solidago missouriensis

3497. Solidago missouriensis Nutt. Leaves 3-nerved, distally toothed, ciliate. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2112,-105.3458,WGS 1984) With Pinus ponderosa, Aletes anisatus, Achillea millefolium, Cryptantha virgata, Arctostaphylos uva-ursi, Jamesia americana, Cercocarpus montanus, Holodiscus dumosa, Rubus deliciosus, Verbascum thapsus, and Bouteloua gracilis. In grus adjacent to outcrops of Pikes Peak granite. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: COLO(147) , d: CS(148) , d: FLD(151) , CAS )

Field Notes: Coll. No. 3498, 18 Aug 2025.

Name List: Bouteloua gracilis

3498. Bouteloua gracilis (Kunth) Lag. ex Griffiths. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2113,-105.3457,WGS 1984) With Pinus ponderosa, Aletes anisatus, Achillea millefolium, Solidago missouriensis, Cryptantha virgata, Arctostaphylos uva-ursi, Jamesia americana, Cercocarpus montanus, Holodiscus dumosa, Rubus deliciosus, and Verbascum thapsus. In grus adjacent to outcrops of Pikes Peak granite. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: COLO(147) , d: CS(148) , d: EIU(149) , CAS )

Field Notes: Coll. No. 3499, 18 Aug 2025.

Name List: Senecio spartioides

3499. Senecio spartioides Torr. & A. Gray. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2118,-105.3455,WGS 1984) With Artemisia frigida, Drymocallis fissa, and Muhlenbergia montana. In grus adjacent to outcrops of Pikes Peak granite. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: UCR(145) , d: FLD(151) , d: EIU(149) , OBI )

Field Notes: Coll. No. 3500, 18 Aug 2025.

Name List: Ceanothus fendleri

3500. Ceanothus fendleri A. Gray. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, along a horse or cow trail, 11.3 km. (geodesic) southwest of Deckers. (39.2112,-105.3464,WGS 1984) With Pinus ponderosa, Aletes anisatus, Achillea millefolium, Solidago missouriensis, Cryptantha virgata, Arctostaphylos uva-ursi, Jamesia americana, Cercocarpus montanus, Holodiscus dumosa, Rubus deliciosus, and Verbascum thapsus. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: FLD(151) , OBI )

Field Notes: Coll. No. 3501, 18 Aug 2025.

Name List: Pericome caudata

3501. Pericome caudata A. Gray. Most leaves wilted when collected. East slope of Tarryall Mountains, small ridge above Forest Road 211 and North Twin Creek, outcrop of Pikes Peak granite, 11.3 km. (geodesic) southwest of Deckers. (39.2111,-105.3464,WGS 1984) Fracture in bare granite. This area burned in the Hayman Fire of 2002. 8/18/2025 North Twin Creek, Jefferson County, Colorado. (d: COLO(147) , d: CS(148) , d: REGIS(150) , CAS )

Coll. No. 3501, Pericome caudata.

Field Notes: Coll. No. 3502, 31 Aug 2025.

Name List: Madia glomerata

3502. Madia glomerata Hook. Highest Great Plains above Rocky Flats, about 1.7 mi. west on CO Hwy 72 from CO Hwy 93, 0.9 mi. generally north on Plainview road, then about 200 m. west, just below the spillway of a small dam. (39.8864,-105.2642,WGS 1984) Observed here: Cirsium arvense, Lycopus americanus, Epilobium sp., Fallopia convolvulus, Persicaria pensylvanica, Rumex triangulivalvis, Potentilla recta, Juncus sp. and Bromus inermis. Previously collected about 130 m. west (KHD83324), which occurrence could not be relocated on this date. 8/31/2025 Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. (d: OBI(144) , d: UCR(145) , d: FLD(151) , JCOSs.n. )

Habitat of Coll. No. 3502, Madia glomerata.

Coll. No. 3502, Madia glomerata.

Field Notes: Coll. No. 3503, 3 Sep 2025.

Name List: Chenopodium leptophyllum

3503. Chenopodium leptophyllum (Moq.) Nutt. ex S. Watson. Along an old road into Twin Creek from F. R. 211, 11.8 km. southwest of Deckers. (39.2044,-105.3469,WGS 1984) Also here: Artemisia frigida, Senecio spartioides, Euphorbia serpyllifolia, Cercocarpus montanus, Verbascum thapsus, Bouteloua gracilis, and Eriocoma robusta. 9/3/2025 Twin Creek, Jefferson County, Colorado. (d: OBI(144) , KHD )

Coll. No. 3503, Chenopodium leptophyllum.

Field Notes: Coll. No. 3504, 3 Sep 2025.

Name List: Eriocoma robusta

3504. Eriocoma robusta (Vasey) Romasch. Along an old road into Twin Creek from F. R. 211, 11.8 km. southwest of Deckers. (39.2044,-105.3469,WGS 1984) Also here: Artemisia frigida, Senecio spartioides, Chenopodium leptophyllum, Euphorbia serpyllifolia, Cercocarpus montanus, Verbascum thapsus, and Bouteloua gracilis. 9/3/2025 Twin Creek, Jefferson County, Colorado. (CAS , COLO , FLD , REGIS )

Field Notes: Coll. No. 3505, 3 Sep 2025.

Name List: Euphorbia serpillifolia

3505. Euphorbia serpillifolia Pers. Edge of a drying mud puddle in an old road between Twin Creek and F. R. 211, 11.8 km. southwest of Deckers. (39.2044,-105.3469,WGS 1984) Also here: Artemisia frigida, Senecio spartioides, Chenopodium leptophyllum, Cercocarpus montanus, Verbascum thapsus, Bouteloua gracilis, and Eriocoma robusta. 9/3/2025 Twin Creek, Jefferson County, Colorado. (d: OBI(144) , KHD )

Coll. No. 3505, Euphorbia serpillifolia.

Field Notes: Coll. No. 3506, 3 Sep 2025.

Name List: Symphyotrichum porteri

3506. Symphyotrichum porteri (A. Gray) G.L. Nesom. About 7 miles west and south on F. R. 211 from its north end at County Road 126 to a USFS designated parking place, then about 200 m. generally west on old roads into the Twin Creek drainage, 11.8 km. southwest of Deckers. (39.2046,-105.3472,WGS 1984) Southwest facing slope. Also here: Artemisia frigida, Senecio spartioides, Cercocarpus montanus, Verbascum thapsus, Bouteloua gracilis, and Eriocoma robusta. 9/3/2025 Twin Creek, Jefferson County, Colorado. (FLD , UCR )

Coll. No. 3506, Symphyotrichum porteri

Field Notes: Coll. No. 3507, 3 Sep 2025.

Name List: Artemisia frigida

3507. Artemisia frigida Willd. About 7 miles west and south on F. R. 211 from its north end at County Road 126 to a USFS designated parking place, then about 200 m. generally west on old roads into the Twin Creek drainage, 11.8 km. southwest of Deckers. (39.2045,-105.3473,WGS 1984) Southwest facing slope. Collected with Symphyotrichum porteri; also here: Senecio spartioides, Cercocarpus montanus, Verbascum thapsus, Bouteloua gracilis, and Eriocoma robusta. 9/3/2025 Twin Creek, Jefferson County, Colorado. (KHD )

Coll. No. 3507, Artemisia frigida.

Name List: Artemisia ludoviciana ssp. incompta

3507.1 Artemisia ludoviciana Nutt. ssp. incompta (Nutt.) D. D. Keck. About 7 miles west and south on F. R. 211 from its north end at County Road 126 to a USFS designated parking place, then about 200 m. generally west on old roads into the Twin Creek drainage, 11.8 km. southwest of Deckers. (39.2045,-105.3473,WGS 1984) Southwest facing slope. Collected with Artemisia frigida and Symphyotrichum porteri; also here: Senecio spartioides, Cercocarpus montanus, Verbascum thapsus, Bouteloua gracilis, and Eriocoma robusta. 9/3/2025 Twin Creek, Jefferson County, Colorado. (OBI )

Field Notes: Coll. No. 3508, 3 Sep 2025.

Name List: Symphyotrichum foliaceum var. parryi

3508. Symphyotrichum foliaceum (DC.) G. L. Nesom var. parryi (D. C. Eaton) G. L. Nesom. Bank of Twin Creek. About 7 miles west and south on F. R. 211 from its north end at County Road 126 to a USFS designated parking place, then about 220 m. generally west on old roads into the Twin Creek drainage, 11.9 km. southwest of Deckers. (39.2046,-105.3480,WGS 1984) With Bouteloua gracilis. 9/3/2025 Twin Creek, Jefferson County, Colorado. (d: OBI(144) , d: UCR(145) , KHD )

Coll. No. 3508, Symphyotrichum foliaceum var. parryi.

Field Notes: Coll. No. 3509, 3 Sep 2025.

Name List: Muhlenbergia wrightii

3509. Muhlenbergia wrightii Vasey ex J.M. Coult. About 7 miles west and south on F. R. 211 from its north end at County Road 126 to a USFS designated parking place, then about 220 m. generally west on old roads into the Twin Creek drainage, 11.9 km. southwest of Deckers. (39.2046,-105.3480,WGS 1984) Small terrace beside Twin Creek. With Symphyotrichum foliaceum var. parryi and Bouteloua gracilis 9/3/2025 Twin Creek, Jefferson County, Colorado. (CAS , FLD , REGIS , UCR )

Coll. No. 3509, Muhlenbergia wrightii.

Field Notes: Coll. No. 3510, 3 Sep 2025.

Name List: Ericameria parryi var. affinis

3510. Ericameria parryi (A. Gray) G. I. Nesom & G. I. Baird var. affinis (A. Nelson) G. L. Nesom & G. I. Baird. About 7 miles west and south on F. R. 211 from its north end at County Road 126 to a USFS designated parking place, then about 235 m. generally west on old roads into the Twin Creek drainage, 11.9 km. southwest of Deckers. (39.2046,-105.3483,WGS 1984) Broad terrace on right bank of Twin Creek 9/3/2025 Twin Creek, Jefferson County, Colorado. (KHD , OBI )

Coll. No. 3510, Ericameria parryi var. affinis.

Field Notes: Coll. No. 3511, 3 Sep 2025.

Name List: Alnus incana ssp. tenuifolia

3511. Alnus incana (L.) Moench ssp. tenuifolia (Nutt.) Brietung. About 7 miles west and south on F. R. 211 from its north end at County Road 126 to a USFS designated parking place, then about 325 m. generally northwest on old roads into the Twin Creek drainage, 11.8 km. southwest of Deckers. (39.2056,-105.3489,WGS 1984) Dense thicket about 125 m. by 25 m. wide on both sides of Twin Creek. Coll. Nos. 3511 and 3512.1 have only pistillate catkins; Coll. No. 3512 has both pistillate and staminate catkins. 9/3/2025 Twin Creek, Jefferson County, Colorado. (JCOSs.n. , KHD , OBI , UCR )

Coll. No. 3511, Alnus incana ssp. tenuifolia

Field Notes: Coll. No. 3512, 3 Sep 2025.

Name List: Alnus incana ssp. tenuifolia

3512. Alnus incana (L.) Moench ssp. tenuifolia (Nutt.) Brietung. About 7 miles west and south on F. R. 211 from its north end at County Road 126 to a USFS designated parking place, then about 325 m. generally northwest on old roads into the Twin Creek drainage, 11.8 km. southwest of Deckers. (39.2059,-105.3490,WGS 1984) Dense thicket about 125 m. by 25 m. wide on both sides of Twin Creek. Coll. Nos. 3511 and 3512.1 made on the ends of the thicket have only pistillate catkins; Coll. No. 3512 made in the middle of the thicket has both pistillate and staminate catkins. 9/3/2025 Twin Creek, Jefferson County, Colorado. (d: CAS(146) , d: UCR(145) , d: OBI(144) , KHD )

Coll. No. 3512, Alnus incana ssp. tenuifolia.

Field Notes: Coll. No. 3512.1, 3 Sep 2025.

Name List: Alnus incana ssp. tenuifolia

3512.1 Alnus incana (L.) Moench ssp. tenuifolia (Nutt.) Brietung. About 7 miles west and south on F. R. 211 from its north end at County Road 126 to a USFS designated parking place, then about 325 m. generally northwest on old roads into the Twin Creek drainage, 11.8 km. southwest of Deckers. (39.2059,-105.3490,WGS 1984) Dense thicket about 125 m. by 25 m. wide on both sides of Twin Creek. Coll. Nos. 3511 and 3512.1 made on the ends of the thicket have only pistillate catkins; Coll. No. 3512 made in the middle of the thicket has both pistillate and staminate catkins. 9/3/2025 Twin Creek, Jefferson County, Colorado. (d: CS(148) , d: EIU(149) , d: REGIS(150) , COLO )

Field Notes: Coll. No. 3513, 3 Sep 2025.

Name List: Trifolium pratense

3513. Trifolium pratense L. Few large, pink flowers, perhaps few because of late season. Flood plain of North Twin Creek just below where crossed by F. R. 211, about 6.8 miles west and south from its north end on County Road 126, 11.4 km. southwest of Deckers. (39.2076,-105.3439,WGS 1984) Shade of willows. This area burned in the Hayman Fire of 2002. 9/3/2025 North Twin Creek, Jefferson County, Colorado. (d: COLO(147) , d: CS(148) , d: REGIS(150) , CAS )

Field Notes: Coll. No. 3514, 3 Sep 2025.

Name List: Leucanthemum vulgare

3514. Leucanthemum vulgare (Vaill.) Lam. Weed: CO DofA, List: B. Streambed and banks of North Twin Creek just below where crossed by F. R. 211, about 6.8 miles west and south from its north end on County Road 126, 11.4 km. southwest of Deckers. (39.2079,-105.3446,WGS 1984) Shade of willows. This area burned in the Hayman Fire of 2002. 9/3/2025 North Twin Creek, Jefferson County, Colorado. (CAS , COLO , CS , UCR )

Field Notes: Coll. No. 3515, 11 Sep 2025.

Name List: Symphyotrichum ericoides

3515. Symphyotrichum ericoides (Linnaeus) G. L. Nesom. Central part of the open space, in a less-disturbed area, just above the Welch Ditch and in between various trees and shrubs, 1.02 km. southwest of the GNIS location of Golden. (39.7493,-105.2299,WGS 1984) Dry, gravelly north-facing slope, with Linum sp., Cercocarpus montanus, Rhus trilobata, Yucca glauca, and Bromus inermis. This parcel was designated a City of Golden Open Space in 2025. 9/11/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (d: FLD(151) , d: UCR(145) , d: OBI(144) , KHD )

Coll. No. 3515, Symphyotrichum ericoides.

Field Notes: Coll. No. 3516, 11 Sep 2025.

Name List: Liatris punctata

3516. Liatris punctata Hook. Central part of the open space, in a less-disturbed area, just above the Welch Ditch and in between various trees and shrubs, 1.02 km. southwest of the GNIS location of Golden. (39.7494,-105.2298,WGS 1984) Dry, gravelly north-facing slope, with Rhus trilobata, Symphyotrichum ericoides, Linum sp., Cercocarpus montanus, Yucca glauca, and Bromus inermis. This parcel was designated a City of Golden Open Space in 2025. 9/11/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (d: UCR(145) , d: CAS(146) , d: FLD(151) , OBI )

Field Notes: Coll. No. 3517, 11 Sep 2025.

Name List: Symphyotrichum fendleri

3517. Symphyotrichum fendleri (A. Gray) G. L. Nesom. Central part of the open space, in a less-disturbed area, just above the Welch Ditch and in between various trees and shrubs, 1.02 km. southwest of the GNIS location of Golden. (39.7494,-105.2298,WGS 1984) Dry, gravelly north-facing slope, with Rhus trilobata, Liatris punctata, Symphyotrichum ericoides, Linum sp., Cercocarpus montanus, Yucca glauca, and Bromus inermis. This parcel was designated a City of Golden Open Space in 2025. 9/11/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (FLD , KHD , OBI )

Coll. No. 3517, Symphyotrichum fendleri.

Comments: 11/26/2025, Collection No. 3517, 11 September 2025, characters observed: Perennial herb, to 25 cm., caudex unknown; Stem, strigose; Leaves, cauline, alternate, sessile, blade 28 mm. × 2 mm. wide, reduced distally, linear to linear-oblanceolate, entire, margins regularly-spaced ciliate, tips white-spinulose; Inflorescence, 6± heads per stem; Involucre, 5 mm. × 7 mm. wide, bell-shaped; Phyllaries, unequal, 3± series, 4-5 mm. × 1.2 mm. wide, base indurate, diamond-shaped green distally, stipitate-glandular, margins flat, tips acuminate; Receptacle, epaleate; Flowers, of 2 kinds; Rays, #15±, tube 6 mm. + blade 6-7 mm. × 1.3 mm. wide, blue; Disk flowers, many, 4 mm., yellow; Pappus, many well-developed bristles, 4.5 mm., brown to light tan ("cinnamon to sordid" in FNANM); Cypsela, 1 mm. × 0.5 mm. wide, light brown. The FNANM term "strigoso-hispid" may apply more accurately to stem and leaf margin hairs.

Field Notes: Coll. No. 3518, 11 Sep 2025.

Name List: Atriplex canescens

3518. Atriplex canescens (Pursh) Nutt. Two mature shrubs. Slope above right bank of Welch Ditch, 955 m. southwest of the GNIS location of Golden.With Artemisia ludoviciana, Kraschinnikovia lanata, and Bromus inermis. Additional plants about 66 m. east on CDOT right of way. This parcel was designated a City of Golden Open Space in 2025. 9/11/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (d: FLD(151) , d: COLO(147) , CAS )

Coll. No. 3518, Atriplex canescens.

Field Notes: Coll. No. 3519, 11 Sep 2025.

Name List: Artemisia campestris ssp. caudata

3519. Artemisia campestris L. ssp. caudata (Michx.) Palmer & Steyerm. Basal leaves withered, single stems, cauline leaves divided. Top of the ridge in the northeast part of the Open Space, near the windsock for the hang gliders, appears to be pre-development topography, 918 m. southwest of the GNIS location of Golden. (39.7496,-105.2285,WGS 1984) With Artemisia ludoviciana and Alyssum simplex. 9/11/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (d: OBI(144) , KHD )

Field Notes: Coll. No. 3520, 11 Sep 2025.

Name List: Xanthisma spinulosum

3520. Xanthisma spinulosum (Pursh) D. R. Morgan & R. L. Hartm. Top of the ridge in the northeast part of the Open Space, appears to be pre-development topography, 950 m. southwest of the GNIS location of Golden. (39.7492,-105.2286,WGS 1984) In short grasses with Artemisia campestris, Grindelia subalpina, Mentzelia nuda, and Mirabilis linearis; Hybanthus verticillatus previously found nearby but not seen on this date. This parcel was designated a City of Golden Open Space in 2025. 9/11/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (d: REGIS(150) , d: FLD(151) , d: EIU(149) , CS )

Field Notes: Coll. No. 3521, 11 Sep 2025.

Name List: Grindelia inornata

3521. Grindelia inornata Greene. About a dozen plants here; leaves serrate, except some proximal cauline leaves entire; inflorescence ray-less. In a small gulch below Parfet Estates Drive, general topography is probably original but area disturbed by water line installation, 1.01 km. southwest of the GNIS location of Golden. (39.7491,-105.2294,WGS 1984) With Ericameria nauseosa var. graveolens and Bromus inermis. This parcel was designated a City of Golden Open Space in 2025. 9/11/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (d: OBI(144) , d: UCR(145) , d: FLD(151) , KHD )

Coll. No. 3521, Grindelia inornata.

Leaves of Coll. No. 3521, Grindelia inornata.

Coll. No. 3521, Grindelia inornata.

Field Notes: Coll. No. 3522, 11 Sep 2025.

Name List: Gutierrezia sarothrae

3522. Gutierrezia sarothrae (Pursh) Britton & Rusby. Upper slope, southwest part of open space, 1.11 km. southwest of the GNIS location of Golden. (39.7485,-105.2303,WGS 1984) With Artemisia ludoviciana, Symphyotrichum ericoides, and Opuntia polyacantha. Designated as a City of Golden Open Space in 2025. 9/11/2025 Parfet Open Space (City of Golden), Jefferson County, Colorado. (d: UCR(145) , FLD )

Field Notes: Coll. No. 3523, 14 Sep 2025.

Name List: Cenchrus longispinus

3523. Cenchrus longispinus (Hack.) Fern. Approximate center of park, in mowed verge of natural area adjacent to sidewalk, in a strip about 1 m. wide by 9 m. long, 1.02 km. (geodesic) northwest of the GNIS location of Golden. (39.7583,-105.2325,WGS 1984) This area receives some water that flows across the sidewalk from the turf area. 9/14/2025 New Loveland Mine Park, Jefferson County, Colorado. (d: OBI(144) , d: UCR(145) , d: CAS(146) , KHD )

Comments: 10/29/2025, First collection in Jefferson County on plains east of Golden: J. H. Ehlers #8524, 10 September 1942, BRIT. First collection in Golden at DeLong Park: Tom Schweich, #2907, 18 August 2022, COLO, CS, KHD. Also reported along Table Heights Drive adjacent to South Table Mountain.211111111111

Field Notes: Coll. No. 3524, 15 Sep 2025.

Name List: Ericameria nauseosa var. nauseosa

3524. Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird var. nauseosa. Northern portion of the Tony Grampsas Memorial Sports Complex, lower northeast slope of small alluvial hill, southeast side of North Table Mountain, 4.06 km. (geodesic) northeast of the GNIS location of Golden. (39.7811,-105.1871,WGS 1984) With: Artemisia dracunculus, Alyssum simplex, Opuntia macrorhiza, Bromus tectorum, and Hesperostipa comata. Compare to Coll. No. 3528 of var. graveolens collected 131 m. to the northwest. This area was designated a City of Golden open space in 2025. 9/15/2025 Grampsas North Open Space (City of Golden), Jefferson County, Colorado. (d: COLO(147) , d: CS(148) , CAS )

Comments: 10/29/2025, Phyllaries ciliate.

Field Notes: Coll. No. 3525, 15 Sep 2025.

Name List: Artemisia dracunculus

3525. Artemisia dracunculus L. Northern portion of the Tony Grampsas Memorial Sports Complex, lower northeast slope of small alluvial hill, southeast side of North Table Mountain, 4.02 km. (geodesic) northeast of the GNIS location of Golden. (39.7810,-105.1877,WGS 1984) Also here: Thelesperma megapotamicum, Alyssum simplex, Pediomelum tenuiflorum, Linaria dalmatica, and Hesperostipa comata. This area was designated a City of Golden open space in 2025. 9/15/2025 Grampsas North Open Space (City of Golden), Jefferson County, Colorado. (d: EIU(149) , d: UCR(145) , d: CAS(146) , OBI )

Field Notes: Coll. No. 3526, 15 Sep 2025.

Name List: Brickellia eupatorioides

3526. Brickellia eupatorioides (L.) Shinners. Northern portion of the Tony Grampsas Memorial Sports Complex, lowest northeast slope of small alluvial hill, southeast side of North Table Mountain, 4.10 km. (geodesic) northeast of the GNIS location of Golden. (39.7818,-105.1873,WGS 1984) Also here: Symphyotrichum ericoides, Pediomelum tenuiflorum, Potentilla recta, and Bromus inermis. This area was designated a City of Golden open space in 2025. 9/15/2025 Grampsas North Open Space (City of Golden), Jefferson County, Colorado. (d: CAS(146) , d: REGIS(150) , UCR )

Field Notes: Coll. No. 3527, 15 Sep 2025.

Name List: Symphyotrichum ericoides

3527. Symphyotrichum ericoides (Linnaeus) G. L. Nesom. Northern portion of the Tony Grampsas Memorial Sports Complex, lowest northeast slope of small alluvial hill, southeast side of North Table Mountain, 4.10 km. (geodesic) northeast of the GNIS location of Golden. (39.7818,-105.1874,WGS 1984) Also here: Ambrosia psilostachya, Brickellia eupatorioides, Ericameria nauseosa var. graveolens, Potentilla recta, and Bromus inermis. This area was designated a City of Golden open space in 2025. 9/15/2025 Grampsas North Open Space (City of Golden), Jefferson County, Colorado. (d: COLO(147) , d: CS(148) , d: EIU(149) , CAS )

Secund head of Coll. No. 3527, Symphyotrichum ericoides.

Field Notes: Coll. No. 3528, 15 Sep 2025.

Name List: Ericameria nauseosa var. graveolens

3528. Ericameria nauseosa (Pall. ex Pursh) G.L.Nesom & G.I.Baird var. graveolens (Nutt.) Reveal & Schuyler. Northern portion of the Tony Grampsas Memorial Sports Complex, flat field, southeast side of North Table Mountain, 4.10 km. (geodesic) northeast of the GNIS location of Golden. (39.7821,-105.1879,WGS 1984) Dense stand of Ericameria nauseosa var. graveolens with Ambrosia psilostachya, Chenopodium album, Physalis hederifolia, and Bromus japonicus. Compare to Coll. No. 3524 of var. nauseosa collected 131 m. to the southeast. This area was designated a City of Golden open space in 2025. 9/15/2025 Grampsas North Open Space (City of Golden), Jefferson County, Colorado. (d: COLO(147) , d: CS(148) , d: EIU(149) , CAS )

Sea of “Goldy-locks” at Grampsas North Open Space.

Field Notes: Coll. No. 3529, 15 Sep 2025.

Name List: Chenopodium album

3529. Chenopodium album L. Northern portion of the Tony Grampsas Memorial Sports Complex, flat field, southeast side of North Table Mountain, 4.10 km. (geodesic) northeast of the GNIS location of Golden. (39.7821,-105.1879,WGS 1984) Dense stand of Ericameria nauseosa var. graveolens with Ambrosia psilostachya, Physalis hederifolia, and Bromus japonicus. This area was designated a City of Golden open space in 2025. 9/15/2025 Grampsas North Open Space (City of Golden), Jefferson County, Colorado. (d: CAS(146) , d: COLO(147) , d: CS(148) , OBI )

Field Notes: Coll. No. 3530, 18 Sep 2025.

Name List: Grindelia subalpina

3530. Grindelia subalpina Greene. Leaves dentate-apiculate. Along a social trail towards the north end of the City of Golden North Table Mountain Open Space, in a hummocky area that is probably an ancient landslide, 3.0 km. north of the GNIS location of Golden (39.7764,-105.2255,WGS 1984) Also seen or collected here: Heterotheca villosa, Symphyotrichum porteri, Lupinus argenteus, Monarda fistulosa, Bromus inermis, and B. japonicus. 9/18/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: CS(148) , d: EIU(149) , d: REGIS(150) , KHD )

Coll. No. 3530, Grindelia subalpina.

Comments: 10/24/2025, Coll. No. 3530, 18 September 2025, characters observed: Perennial herb, 45-60 cm.; Stem, light brown, glabrous; Leaves, cauline, alternate, sessile, blade 45 mm. × 12 mm. wide, reduced distally, oblanceolate, adaxially glandular, margins, dentate, teeth separated 3-5 mm., apiculate; Inflorescence, heads, #3-4 per stem, not overtopped by leaves, showy, gummy exudate; Involucre, 10 mm. × 13 mm. wide, globose, resinous; Phyllaries, in 5± unequal graduated series, lower << rest of involucre, upper 8 mm. × 1.3 mm. wide, resinous, margins, flat, tips, acuminate, lower coiled 360°; Pappus, few, well developed bristles, 3.5 mm, readily falling; Style, 2-branched, stigmatic portion 0.6 mm. + appendages 0.6 mm.; Cypsela, 1.6 mm. × 0.6 mm. wide, black, glabrous.

Field Notes: Coll. No. 3531, 18 Sep 2025.

Name List: Heliomeris multiflora var. multiflora

3531. Heliomeris multiflora Nutt. var. multiflora. Along a social trail towards the north end of the North Table Mountain Open Space, in a flat area that is probably the head of an ancient landslide, 2.5 km. north of the GNIS location of Golden. (39.7780,-105.2252,WGS 1984) Also seen or collected nearby: Ericameria nauseosa vars. graveolens and nauseosa, Symphyotrichum ericoides, Symphoricarpos sp., Calochortus gunnisonii, and Nassella viridula. Same as Coll. No. 3533. 9/18/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: CS(148) , d: EIU(149) , COLO )

Comments: 10/26/2025, Coll. No. 3531 & 3533, 18 September 2025, characters observed: Perennial herb, to 45 cm.; Stem, proximally glabrate to strigose distally; Leaves, cauline, opposite to few alternate distally, petiole, 3 mm., blade 52 mm. × 13 mm. wide, reduced distally, rhombo-lanceolate, strigose, margins, mostly entire, larger leaves barely serrulate; Inflorescence, heads, 4-10 per stem, showy, not overtopped by leaves; Peduncles, indistinct; Involucre, 5.5 mm. × 10 mm. wide, hemispheric; Phyllaries, in 2-3 ±equal series, 5.5 mm. × 1.5 mm. wide, green, veins, #3, prominent adaxially, margins, flat, tips, acute; Receptacle, paleate; Palea, 5 mm. × 0.9 mm. wide; Perianth, 2 or more whorls; Ray flowers, many, tube, 1.2 mm. + blade 7 mm. × 2.8 mm. wide, yellow, sterile; Disk flowers, many, tube 2.5 mm. + lobes 0.5 mm., yellow, bisexual; Pappus, absent; Cypsela, 1.5 mm. × 0.6 mm. wide, obconic, glabrous, light brown, beakless.

Field Notes: Coll. No. 3532, 18 Sep 2025.

Name List: Symphyotrichum ericoides

3532. Symphyotrichum ericoides (Linnaeus) G. L. Nesom. Heads secund. Along a social trail towards the north end of the North Table Mountain Open Space, in a flat area that is probably the head of an ancient landslide, 2.52 km. (geodesic) north of the GNIS location of Golden. (39.7781,-105.2252,WGS 1984) With Heliomeris multiflora var. multiflora, Symphoricarpos sp., Monarda fistulosa, Pediomelum tenuiflorum, Calochortus gunnisonii, and Nassella viridula. This area was designated a City of Golden Open Space in 2025. 9/18/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: UCR(145) , d: CAS(146) , OBI )

Field Notes: Coll. No. 3533, 18 Sep 2025.

Name List: Heliomeris multiflora var. multiflora

3533. Heliomeris multiflora Nutt. var. multiflora. Along a social trail towards the north end of the North Table Mountain Open Space, in a hummocky area that is probably an ancient landslide, 2.42 km. north of the GNIS location of Golden (39.7771,-105.2250,WGS 1984) Also seen or collected nearby: Artemisia ludoviciana, Ericameria nauseosa vars. graveolens and nauseosa, Gutierrezia sarothrae, Liatris punctata, Turritis glabra, Toxicoscordiom paniculatum, and Bromus inermis. Same as Coll. No. 3531. 9/18/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: REGIS(150) , d: OBI(144) , KHD )

Coll. No. 3533, Heliomeris multiflora var. multiflora.

Field Notes: Coll. No. 3534, 18 Sep 2025.

Name List: Ericameria nauseosa var. nauseosa

3534. Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird var. nauseosa. Along a social trail towards the north end of the North Table Mountain Open Space, in a flat area that is probably the head of an ancient landslide, 2.41 km. (geodesic) north of the GNIS location of Golden. (39.7770,-105.2250,WGS 1984) With Artemisia ludoviciana, Carduus nutans, Heliomeris multiflora var. multiflora, Turritis glabra, Toxicoscordion paniculatum, and Bromus inermis. This area was designated a City of Golden open space in 2025. Compare to Coll. No. 3535 of var. graveolens which was collected about 15 meters to the north. 9/18/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: CS(148) , d: EIU(149) , d: REGIS(150) , KHD )

Field Notes: Coll. No. 3535, 18 Sep 2025.

Name List: Ericameria nauseosa var. graveolens

3535. Ericameria nauseosa (Pall. ex Pursh) G.L.Nesom & G.I.Baird var. graveolens (Nutt.) Reveal & Schuyler. Along a social trail towards the north end of the North Table Mountain Open Space, in a flat area that is probably the head of an ancient landslide, 2.42 km. (geodesic) north of the GNIS location of Golden. (39.7771,-105.2250,WGS 1984) With Artemisia ludoviciana, Carduus nutans, Heliomeris multiflora var. multiflora, Turritis glabra, Toxicoscordion paniculatum, and Bromus inermis. This area was designated a City of Golden open space in 2025. Compare to Coll. No. 3534 of var. nauseosa which was collected about 15 meters to the south. 9/18/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: CS(148) , d: EIU(149) , d: REGIS(150) , KHD )

Field Notes: Coll. No. 3536, 18 Sep 2025.

Name List: Solidago rigida var. humilis

3536. Solidago rigida L. var. humilis Porter. Leaves 1-nerved, inflorescence flat-topped, phyllaries with 5 parallel nerves. On an old road that formerly went to the top of the mesa, in an area of hummocky terrain that is probably an ancient landslide, 2.3 km. (geodesic) north of the GNIS location of Golden. (39.7768,-105.2252,WGS 1984) Low shrubs and grasses, with: Achillea millefolium, Grindelia subalpina, Gutierrezia sarothrae, Heterotheca villosa, Liatris punctata, Bromus inermis and B. japonicus. This area was designated a City of Golden open space in 2025. 9/18/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: UCR(145) , d: EIU(149) , d: COLO(147) , KHD )

Coll. No. 3536, Solidago rigida var. humilis.

Comments: 11/28/2025, This appears to be the first collection from Golden.

Field Notes: Coll. No. 3537, 18 Sep 2025.

Name List: Gutierrezia sarothrae

3537. Gutierrezia sarothrae (Pursh) Britton & Rusby. On an old road that formerly went to the top of the mesa, in an area of hummocky terrain that is probably an ancient landslide, 2.37 km. (geodesic) north of the GNIS location of Golden. (39.7768,-105.2251,WGS 1984) Low shrubs and grasses, with: Achillea millefolium, Grindelia subalpina, Heterotheca villosa, Liatris punctata, Solidago rigida var. humilis, Bromus inermis and B. japonicus. This collection is from an old shrub, but there aren't many shrubs here. This area was designated a City of Golden open space in 2025. 9/18/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: EIU(149) , d: CAS(146) , d: CS(148) , OBI )

Field Notes: Coll. No. 3538, 18 Sep 2025.

Name List: Symphyotrichum porteri

3538. Symphyotrichum porteri (A. Gray) G.L. Nesom. Petals white with a slight lavender cast. Beside the City of Golden North Table Mountain Trail, in an area of hummocky terrain that is probably an ancient landslide, 2.33 km. (geodesic) north of the GNIS location of Golden. (39.7762,-105.2259,WGS 1984) With Liatris punctata, Solidago rigida var. humilis, Symphyotrichum ericoides, Monarda fistulosa, and Carex inops ssp. heliophila. This area was designated a City of Golden open space in 2025. 9/18/2025 North Table Mountain Open Space (City of Golden), Jefferson County, Colorado. (d: EIU(149) , CS )

Coll. No. 3538, Symphyotrichum porteri.

Field Notes: Coll. No. 3539, 30 Sep 2025. Oregon Route 31: Coll. No. 3539, 30 Sep 2025.

Name List: Ericameria nauseosa var. oreophila

3539. Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird var. oreophila (A.Nelson) G.L.Nesom & G.I.Baird. Roadside beside Oregon Highway 31, 4.7 km. east of McCarty Butte, the nearest GNIS-recognized geographical feature, 33 miles southeast of La Pine, Oregon. (43.3219,-121.1736,WGS 1984) 9/30/2025 McCarty Butte, Lake County, Oregon. (d: UCR(145) , d: CAS(146) , d: OBI(144) , d: EIU(149) )

Coll. No. 3539, Ericameria nauseosa var. oreophila.

Comments: 10/20/2025, Coll. No. 3539, 30 September 2025, characters observed: Perennial shrub, 40 cm.; Stem, proximal, dull white, tomentose, resinous, almost to the involucres; Leaves, cauline, alternate, sessile, blade 20-37 mm. × (barely) 1 mm. wide, reduced distally, sulcate (not flat), linear, entire, tomentose; Heads, discoid; Involucre, 10 mm. × 4 mm. wide, obconic, glabrous; Phyllaries, unequal, 4±-series, outer << rest of involucre, inner 7-9 mm. × 1.8-1.2 mm. wide, glabrous, mid-vein, ±raised, visible along length, margins, flat, scarious, tips, acute; Receptacle, epaleate; Flowers of 1 kind; Disk flowers, #5±, tube 8-9 mm. + lobes 1 mm., yellow, throat expanding gradually, few short hairs proximally, otherwise glabrous; Pappus, many, well-developed bristles, 7 mm., ±equal; Anther, base rounded; Style, filiform, 2-branched, brush-like appendages, style 8.63 mm. + stigma 1.75 mm. + appendage 1.3 mm. (n=4); Stigma, > style appendages; Cypsela, 4-6 mm. × 0.6 mm. wide, compressed front-to-back, brown, hairy. Corolla lobes short for var. oreophila, but otherwise that seems to be the best fit.

Field Notes: Coll. No. 3540, 7 Oct 2025.

Name List: Ambrosia trifida

3540. Ambrosia trifida L. North edge of privately-owned vacant land at approximately 1300 Avery Street. (39.7781,-105.2335,WGS 1984) Immediately adjacent to asphalt driveway with Ambrosia psilostachya. Coordinates estimated with GoogleEarth. Encountered as part of a native plant rescue activity with Golden's Weedbusters. 10/7/2025 Golden, Jefferson County, Colorado. (d: REGIS(150) , d: CAS(146) , d: UCR(145) , OBI )

Coll. No. 3540, Ambrosia trifida.

Comments: 10/13/2025, Coll. No, 3540, 7 Oct 2025, characters observed: Annual, 60 cm.; Stem, erect; Leaves, opposite, petioles 4-8 mm., unlobed or palmately 3-lobed, unlobed, ellipto-lanceolate, 75 mm. × 21 mm. wide, margin crenate-serrate, adaxial green papillose-hispid, abaxial green papillose hispid; Pistillate heads, clustered in axils; Staminate heads, peduncles 1-1.3 mm., involucres cup-shaped, with black nerves; Burs, obpyramidal, body 5 mm. × 3 mm. wide + beak 3 mm. = 8 mm., spines, 5 in one series, distal.

Field Notes: Coll. No. 3541, 24 Mar 2026.

Name List: Pyrus calleryana

3541. Pyrus calleryana Decne. Jard. Fruit. 1:329 (1871). Street tree at 410 Cheyenne. (39.7609,-105.2298,WGS 1984) 3/24/2026 Golden, Jefferson County, Colorado. (Undist. )

Coll. No. 3541, Pyrus calleryana on Cheyenne Street

Field Notes: Coll. No. 3542, 24 Mar 2026.

Name List: Malus

3542. Malus L. Street tree at 420 Arapahoe. (39.7613,-105.2287,WGS 1984) 3/24/2026 Golden, Jefferson County, Colorado. (Undist. )

Coll. No. 3542, Malus sp.

Field Notes: Coll. No. 3543, 24 Mar 2026.

Name List: Malus

3543. Malus L. Street tree at 900 5th Street. (39.7610,-105.2284,WGS 1984) 3/24/2026 Golden, Jefferson County, Colorado. (Undist. )

Field Notes: Coll. No. 3544, 24 Mar 2026.

Name List: Scilla luciliae

3544. Scilla luciliae (Boiss.) Speta. Naturalized in landscaping beds at 420 Arapahoe. (39.7613,-105.2287,WGS 1984) 3/24/2026 Golden, Jefferson County, Colorado. (Undist. )

Coll. No. 3544, Scilla luciliae.

Field Notes: Coll. No. 3545, 25 Mar 2026.

Name List: Amelanchier alnifolia

3545. Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. trailside below ditch (39.7524,-105.2409,WGS 1984) with Pseudostuga menziesii, Berberis repens, Cercocarpus montanus, Prunus virginiana, Yucca glauca, 3/25/2026 Clear Creek Canyon Park, Jefferson County, Colorado. (Undist. )

Coll. No. 3545, Amelanchier alnofolia.

Field Notes: Coll. No. 3546, 25 Mar 2026.

Name List: Prunus americana

3546. Prunus americana Marshall. on the edge of the ditch (39.7517,-105.2391,WGS 1984) with Grindelia subalpina, Prunus virginia, Acer negundo 3/25/2026 Windy Saddle Park, Jefferson County, Colorado. (Undist. )

Field Notes: Coll. No. 3547, 25 Mar 2026.

Name List: Pinus edulis

3547. Pinus edulis Engelm. two mature trees above the Welch ditch, east facing slope (39.7514,-105.2356,WGS 1984) Cercocarpus montanus 3/25/2026 Windy Saddle Park, Jefferson County, Colorado. (Undist. )

Coll. No. 3547, Pinus edulis.

Field Notes: Coll. No. 3548, 25 Mar 2026.

Name List: Malus domestica

3548. Malus domestica (Suckow) Borkh. Fls large and pink, lvs with a reddish cast (39.7525,-105.2345,WGS 1984) 3/25/2026 Clear Creek, Jefferson County, Colorado. (Undist. )

Flowers of Coll. No. 3548, Malus domestica.

Coll. No. 3548, Malus domestica.

Field Notes: Coll. No. 3549, 30 Mar 2026.

Name List: Salix irrorata

3549. Salix irrorata Andersson. staminate at bridge (39.7358,-105.2147,WGS 1984) rooted in perennial water. 3/30/2026 Kinney Run, Jefferson County, Colorado.

Coll. No. 3549, Salix irrorata.

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