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Detailed Area Plant List for Tarryall Mountains, East Slope, Jefferson County, United States.
Edited by Tom Schweich
This list is assembled from personal collections, herbarium vouchers, and published lists. For California, much of the data is provided by the participants of the Consortium of California Herbaria as indicated by a single dagger “†.” Their web site is at: (http://ucjeps.berkeley.edu/consortium/). For Colorado, much of the data is provided by the Southwest Environmental Information Network as indicated by a double dagger “‡,” which web site is found at (http://swbiodiversity.org). See their respective websites for copyright information and recommended citation formats.
For a complete list of Locations included in this Area List, see the Locations Included section, below.
For a check list, please see: Check List for Tarryall Mountains, East Slope, Jefferson County, United States.
Marchantiophyta
Marchantiophyta . Liverwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek, 6208. 6/26/2026. .
Equisetaceae
Equisetum hyemale L. ssp. affine (Engelm.) Calder & Roy L.Taylor. Tall Scouring Rush. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek, 6206. 6/26/2026. .
Cupressaceae
Juniperus communis L. var. depressa Pursh. Common Juniper. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 4279. 7/21/2025. 6076. 5/15/2026. .
- Dispersed Camp Site #2,
3892.
9/12/2024.
.
 Glaucous stomatal band on leaf of Coll. No. 1361, Juniperus communis var. depressa |
 Coll. No. 1361, Juniperus communis var. depressa |
Pinaceae
Pinus scopulorum Lemmon. (Syn: P. ponderosa Laws. var. scopulorum Engelm. ) Rocky Mountain yellow pine. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 4380. 8/18/2025. 6070. 5/15/2026. .
- Dispersed Camp Site #2,
3884.
9/12/2024.
.
.
 East slope of Tarryall Mountains from Camp Site 8. |
 Coll. No. 1316, Pinus |
 Rocky Mountain yellow pine on top of North Table Mountain. |
Pseudotsuga menziesii (Mirb.) Franco var. glauca (Beissn.) Franco. (Syn: Pseudotsuga menziesii (Mirb.) Franco var. glauca (Mayr) Franco ) Douglas-fir. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 4369. 8/18/2025. 6069. 5/15/2026. .
- Dispersed Camp Site #2,
3885.
9/12/2024.
.
Amaranthaceae
Amaranthus powellii S. Watson. Powell's Pigweed. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
In grus with Pseudotsuga menziesii, Artemisia frigida, A. ludoviciana var. incompta, Ribes cereum, and Cercocarpus montanus.
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.
Tom Schweich 3489.
18 Aug 2025.
(
KHD
)
.
 Coll. No. 3489, Amaranthus powellii. |
Apiaceae
Aletes anisatus (A. Gray) W. L. Theob. & C. C. Tseng. (Syn: Cymopterus anisatus A. Gray ) Anise Indian Parsley. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 6073. 5/15/2026. 6187. 6/12/2026. 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. 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. Tom Schweich 3491. 18 Aug 2025. ( KHD ) Tom Schweich 3575. 15 May 2026. ( Undist. ) Artemisia sp., Drymocallis fissa, Rubus idaea, Carex inops heliophila grus behind outcrop Tom Schweich 3609. 12 Jun 2026. ( Undist. ) Tom Schweich 4374. 8/18/2025. on a disintegrating outcrop of Pikes Peak granite Tom Schweich 4387. 8/18/2025. .
- Tarryall Mountains, East Slope, Soils are gravelly coarse sandy loams derived from weathered Pike's Peak granite. Forest within the 2002 hayman Fire, along FS Road 211 near the decommissioned Molly Gulch Campground. Paula Fornwalt 3. 20 May 2008. ( CS162583‡ ) Disturbed site in mixed forest of Populus tremuloides/ Pseudotsuga menziesii/ Pinus ponderosa burned in Hayman Fire of 2002. Lost Creek Wilderness Area, Pike National Forest, Hankins Gulch Trail, SW of Goose Creek trailhead. Tim Hogan 5135. 3 Jun 2013. ( COLO1818806‡ RMBL6353‡ ) .
- Twin Creek,
6210.
6/26/2026.
.
.
Cymopterus lemmonii (J. M. Coult. & Rose) Dorn. (Syn: Pseudocymopterus montanus (A. Gray) J. M. Coult. & Rose ) Alpine False Springparsley. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 15 cm., glabrous throughout, except very slightly scabrous at top of peduncle and on ribs of some rays; Pseudoscape, absent; Leaves, basal and cauline, 40 mm. × 25 mm. wide, obovate, compound, leaflets, #7, ultimate divisions narrowly lanceolate; Inflorescence, compound umbel; Involucre, bracts, 1.7 mm., linear (but not pinnafitid); Rays, ascending-spreading, ±equal; Involucel, bractlets green, inconspicuous, 1 mm.; Corolla, petals, #5, 1 mm. × 0.6 mm. wide, yellow; Stamens, #5; Filaments, recurved; Ovary, glabrous; Stylopodium, absent (?); Fruit, unknown. (Described from Coll. No. 1469, 29 June 2016)
- North Twin Creek, 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. 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. Tom Schweich 3436. 2 Jul 2025. ( CS KHD ) .
- Twin Creek,
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.
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.
Tom Schweich 3406.
18 Jun 2025.
(
CAS
FLD
OBI
UCR
)
.
.
Heracleum maximum Bartr. Common Cow Parsnip. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
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.
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.
Tom Schweich 3430.
2 Jul 2025.
(
KHD
)
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.
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.
Tom Schweich 3469.
21 Jul 2025.
(
CAS
OBI
UCR
)
.
 Coll. No. 3430, Heracleum maximum. |
 Coll. No. 3430, Heracleum maximum. |
Apocynaceae
Apocynum androsaemifolium L. Bitter Dogbane. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
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.
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.
Tom Schweich 3462.
21 Jul 2015.
(
KHD
OBI
)
.
 Coll. No. 3462, Apocynum androsaemifolium. |
Araliaceae
Aralia nudicaulis L. Wild Sarsaparilla. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Tarryall Mountains, East Slope, In moist soil in the shade of large Psuedotsuga. Pike National Forest. Growing along Goose Creek. Mark Duff 139. 14 Aug 1992. ( COLO451104‡ ) .
Asclepiadaceae
Asclepias speciosa Torr. Showy Milkweed. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Tarryall Mountains, East Slope,
This was being pollinated by a variety of insects, including at leaste two species of bees, ants, and a large unknown insect, all at the same time.
Cheeseman Lake 7/5" Quadrangle. Along Forest Road 211.
Stephen B. Austin 838.
23 Jul 2013.
(
KHD59787‡
)
.
 Seed pod of Asclepias speciosa |
 Seed of Asclepias speciosa |
Asteraceae
. Composite. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek, ?? 6223. 6/26/2026. . .
Achillea millefolium L. (Syn: A. lanulosa Nutt. , A. m. L. var. alpicola (Rydb.) Garrett , A. m. L. var. lanulosa (Nutt.) Piper , A. m. L. var. occidentalis DC. ) Common Yarrow. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb to 50 cm.;; Leaves alternate, tendrils absent, finely dissected, aromatic when fresh; Inflorescence, heads enclosed by an involucre, in flat-topped clusters; Phyllaries in 2+ series; Receptacles bearing scale-like bracts (paleate); Perianth in 2 or more whorls, parts in 5s; Phyllaries in 2+ series, not all subtending ray flowers; Flowers open, bisexual, two kinds, some with strap-shaped corollas; Petals fused into a tube; Ray flowers, white, lobe ovate; Disc flowers, white; Stamens = in number to corolla lobes; Ovary inferior. Pistils, 1 per flower (Described from Coll. No. 482, 30 Nov 2011, and Coll. No. 1023, 24 Jul 2013).
- North Twin Creek, 4229. 7/2/2025. 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. 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. Tom Schweich 3460. 21 Jul 2025. ( CAS FLD OBI ) .
- Dispersed Camp Site #2, 3879. 9/12/2024. .
- Dispersed Camp Site #8,
4591.
4/16/2026.
.
.
Antennaria . Pussytoes. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, Against a low outcrop of Pikes Peak granite, with Artemisia frigida, Drymocallis fissa, and Cercocarpus montanus. Tom Schweich 3577. 15 May 2026. ( Undist. ) . .
Antennaria rosea Greene. Rosy Pussytoes. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 9 cm., stoloniferous 4-5 cm., forming loose mats in wet muddy soil, all sixteen plants collected pistillate (gynoecious?); Leaves, simple, white tomentose both sides, basal, 35 mm. × 9 mm wide, oblanceolate, cauline, 11-13 mm., linear; Inflorescence, >> basal leaves; Involucre, 5.5-7.0 mm.; Bracts (phyllaries), 5.0-6-5 mm. × 1.1-0.7 mm. wide, green at base, purplish band in middle, tips, white, scarious. (Described from Coll. No. 1083, 25 April 2015).
- Tarryall Mountains, East Slope,
aspen grove-marshland
Wigwam Ranch.
John B. Hartwell 736.
4 July 1937.
(
KHD2217‡
)
.
.
 Coll. No. 2529, Antennaria rosea |
 Mat-forming rosettes, probably Antennaria rosea |
 Coll. No. 2529, Antennaria rosea |
 Coll. No. 1083, Antennaria rosea |
 Rosette of Antennaria rosea. |
Artemisia frigida Willd. Prairie Sagewort. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 30 cm., woody at base; Stems many; Leaves alternate, 9 mm., pinnately dissected into 7 parts, silvery hairy; Inflorescence raceme-like, indeterminate, heads 1-3 in axils; Heads have only disk flowers, all alike; Involucre of hairy phyllaries; Phyllaries in 2 series, hairy, not gummy or with tips recurved; Receptacle hairy, not chaffy or bristly; Flowers fertile; Pappus absent; (Described from Coll. No. 1067, 8 Oct 2014).
- Dispersed Camp Site #2, 3881. 9/12/2024. .
- Twin Creek,
4181.
6/18/2025.
Southwest facing slope. Collected with Symphyotrichum porteri; also here: Senecio spartioides, Cercocarpus montanus, Verbascum thapsus, Bouteloua gracilis, and Eriocoma robusta.
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.
Tom Schweich 3507.
3 Sep 2025.
(
KHD
)
.
.
 Coll. No. 1067, Artemisia frigida |
 Coll. No. 3507, Artemisia frigida. |
 Coll. No. 1067, Artemisia frigida |
 Coll. No. 1067, Artemisia frigida |
Artemisia ludoviciana Nutt. ssp. incompta (Nutt.) D. D. Keck. White Sagebrush. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, In grus with Pseudotsuga menziesii, Artemisia frigida, Ribes cereum, and Cercocarpus montanus. 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. Tom Schweich 3488. 18 Aug 2025. ( CAS ) .
- Twin Creek,
Southwest facing slope. Collected with Artemisia frigida and Symphyotrichum porteri; also here: Senecio spartioides, Cercocarpus montanus, Verbascum thapsus, Bouteloua gracilis, and Eriocoma robusta.
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.
Tom Schweich 3507.1
3 Sep 2025.
(
OBI
)
.
.
Cirsium arvense (L.) Scop. (Syn: Breea arvensis (L.) Lessing ) Canada Thistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Annual, to 70 cm., tap-rooted; Leaves, cauline, alternate, sessile but not obviously decurrent, 85 mm. × 20 mm. wide, margin sinuate, spiny, adaxial thinly tomentose, abaxial tomentose; Inflorescence, panicle(?); Heads, many, 30±, 15 mm. × 8 mm. dia., disk flowers only, dioecious, staminate heads, pappus < corolla, pistillate heads, pappus > corolla; Phyllaries, many (6-7) series, outer 3 mm. × 1.5 mm. wide, inner 15 mm. × 1 mm. wide, dark dorsal ridge, tips, spinulose, reflexed; Receptacle, soft bristles, 10 mm.; Pappus, plumose bristles (Described from Coll. No. 1512, 24 July 2016).
- North Twin Creek,
4226.
7/2/2025.
.
.
 Coll. No. 1200, Cirsium arvense |
 Coll. No. 3210, Cirsium arvense. |
 Coll. No. 1512, Cirsium arvense |
 Coll. No. 2773, Cirsium arvense |
Cirsium undulatum (Nutt.) Spreng. Wavy Leaved Thistle. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial thistle, to 30 cm., stout tap root; Stem, leafy, 20 cm.; Leaves, basal and cauline, basal, petiole 25 mm. + blade 180 mm. × 55 mm. wide, oblanceolate, pinnately lobed more than half-way to mid-rib, cauline, reduced above, decurrent 5 mm., 45 mm. × 14 mm. wide, lanceolate, surface, adaxial, thinly tomentose, abaxial, tomentose, margins, spiny; Head, 35 mm. × 40 mm. wide, indented around top of peduncle; Phyllaries, many (7?) series, 13 mm. × 3.5 mm. wide, + robust spine 5-6 mm., body dark dorsal ridge, outer and middle reflexed; Flowers, 1 kind; Disk flowers, 25-36 mm., corolla pink-purple; Pappus, plumose bristles; Cypsela, 5 mm., apical collar unremarkable. (Described from Coll. No. 1460, 27 June 2016).
- Dispersed Camp Site #8,
Determination tentative
4593.
4/16/2026.
.
.
Cirsium vulgare (Savi) Ten. Bull Thistle. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Leaves, adaxial face with slender appressed bristle-like prickles.
- Twin Creek,
4179.
6/18/2025.
.
.
 Coll. No. 3237, Cirsium vulgare. |
 Coll. No. 3237, basal rosette of Cirsium vulgare. |
 Leaf tip of Cirsium vulgare, Coll. No. 1035 |
Dieteria bigelovii (A. Gray) D. R. Morgan & R. L. Hartman var. bigelovii. Bigelow's Tansy Aster. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, In grus with Pseudotsuga menziesii, Amaranthus powellii, Artemisia frigida, Ribes cereum, and Cercocarpus montanus. This area burned in the Hayman Fire of 2002. 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. Tom Schweich 3489.1 18 Aug 2025. ( CAS ) .
- Dispersed Camp Site #2,
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.
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.
Tom Schweich 3372.
12 Sep 2024.
.
.
Ericameria parryi (A. Gray) G. I. Nesom & G. I. Baird var. affinis (A. Nelson) G. L. Nesom & G. I. Baird. Parry's Rabbitbrush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek,
Vegetative, determination tentative, compare to Coll. No. 3510, only other one seen.
6217.
6/26/2026.
Broad terrace on right 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 235 m. generally west on old roads into the Twin Creek drainage, 11.9 km. southwest of Deckers.
Tom Schweich 3510.
3 Sep 2025.
(
KHD
OBI
)
.
.
 Coll. No. 3510, Ericameria parryi var. affinis. |
Erigeron canadensis (L.) Cronquist. (=Conyza canadensis (L.) Cronquist) Canadian Horseweed. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, to 70 cm.; Leaves, alternate, lanceolate, to 60 mm. × 6 mm.; Inflorescence, panicle-like; Heads, many, inconspicuously radiate (i.e., two kinds of flowers, some flowers strap-shaped, but not obvious unless examined closely); Phyllaries, weakly graduated, with 1 central vein turning red-brown when dry; Receptacle epaleate; Flowers, rays: 0.7 mm. (measured from opening of tube to tip of lobe[s]), pistillate, white, disc: yellow, 4-lobed; Pappus, well-developed bristles (Described from Coll. No. 518, 2 Aug 2007).
- North Twin Creek, 4389. 9/3/2025. . .
Erigeron compositus Pursh. (Syn: E. compositus Pursh var. discoideus A. Gray , E. compositus Pursh var. glabratus Macoun ) Cutleaf Daisy. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, from woody caudex, 10 cm.; Leaves, basal, petiole, 18-22 mm., 5 mm. × 6 mm. wide, ternately divided, glandular, straight multicellular hairy; Inflorescence, 1 head per stem; Peduncles, 40 mm., glandular, short straight spreading hairs; Involucre, 5 mm. × 10 mm. wide; Phyllaries, 2+ series, 6 mm. × 1.3 mm. wide, outer phyllaries glandular hairy, green mid-rib and distally, chartaceous then scarious toward margin, tip, acute, purplish; Receptacle, epaleate; Flowers, of 2 kinds; Ray flowers, #25, tube 1.8 mm. + blade 5.3 mm. × 1 mm. wide, white, fertile; Disk flowers, many, tube 3.5 mm. + lobes 0.3 mm., expanding gradually, yellow, open; Pappus, well-developed, bristles, 3.5-3.8 mm., ±equal, capillary; Cypsela, 2.2 mm. × 0.6 mm. wide, angled, brown, hairy. (Described from Coll. No. 1901, 31 May 2018).
- North Twin Creek, Tom Schweich 3574. 15 May 2026. ( Undist. ) .
- Dispersed Camp Site #8,
In grus at base of an outcrop of Pikes Peak granite, with Pediocactus simpsonii, one small Pinus scopulorum.
This area burned by Hayman Fire (2002), mapped as high intensity here.
Point of rocks about 700 m. south southeast of Dispersed Camp #8, 9.4 road miles generally southwest of Deckers by way of County Road 126 and Pike-San Isabel Forest Road 211.
Tom Schweich 3564.
16 Apr 2026.
(
CS
FLD
)
.
.
 Coll. No. 3564, Erigeron compositus. |
 Coll. No. 3564, Erigeron compositus. |
 Coll. No. 1901, Erigeron compositus |
 Coll. No. 1901, Erigeron compositus |
Erigeron divergens Torr. & A. Gray. Spreading Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Annual or short-lived perennial, to 15 cm., tap-rooted, ±spreading hairy throughout, becoming minutely glandular above, hairs multicellular with clear crosswalls; Leaves, basal, absent or withered; cauline, alternate, petiole ±10 mm. + blade ±12 mm. × 2.4 mm. wide, uniformly hairy, somewhat reduced above; Inflorescence, heads borne singly on leafy stems, peduncles spreading or decurved, but cannot be described as “heads nodding;” Involucre, 3 mm. × limb 12 mm.; Receptacle, epaleate; Flowers, 2 kinds; Rays, corolla, 3.5 mm., white fading blue; Disk flowers, corolla, 1.7 mm., yellow; Pappus, short scales and longer capillary bristles, similar on ray and disk flowers; Cypsela, 0.8 mm. (Described from Coll. No. 1489. 13 July 2016. See also Coll. No. 3381).
- North Twin Creek, Tom Schweich 3607. 12 Jun 2026. ( Undist. ) .
- Dispersed Camp Site #2,
Thin ponderosa pine forest with Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, Eriocoma nelsonii, and Vulpia octoflora.
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.
Tom Schweich 3381.
12 Sep 2024.
(
KHD
)
.
.
Erigeron flagellaris A. Gray. Trailing Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial, to 5-6 cm., with scapose inflorescence to 9 cm., spreading by leafy stoloniferous branches; Leaves, basal and cauline, entire, basal, linear-oblanceolate, 35 mm. × 2.5 mm., cauline, linear, 13 mm. × 1.5 mm.; Inflorescence, single heads on scape to 8 cm.; Receptacle epaleate; Phyllaries, 2+series, ±equal, 4 mm., hairy abaxially, ascending multicellular hairs with clear crosswalls, glandular between hairs; Flowers of 2 kinds; Pappus of bristles, 2 mm., + short scales, that of ray and disc flowers alike; Rays, #±80, corolla white, fading lilac, 8 mm. × 0.5 mm.; Disc flowers, corolla yellow, lobes triangular; Achene, short hairy. (Described from Coll. No. 1116, 28 May 2015).
- North Twin Creek, Tom Schweich 3603. 12 Jun 2026. ( Undist. ) .
- Tarryall Mountains, East Slope, South slope: dry, gravelly soil, with grass and weeds. Pike National Forest: Goose Creek. K. J. Helwick 13. 1 Jun 1916. ( USFS477732‡ ) .
- Twin Creek,
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.
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.
Tom Schweich 3405.
18 Jun 2025.
(
CAS
COLO
FLD
)
.
.
 Coll. No. 2537.1, Erigeron flagellaris |
 Coll. No. 1116, Erigeron flagellaris |
 Coll. No. 1829, Erigeron flagellaris |
 Coll. No. 1829, Erigeron flagellaris |
Erigeron subtrinervis Rydb. ex Porter & Britton. Threenerve Daisy. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
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).
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.
Tom Schweich 3465.
21 Jul 2025.
(
CAS
COLO
CS
)
.
.
 Coll. No. 1988, Erigeron subtrinervis |
 Coll. No. 2240, Erigeron subtrinervis |
 Flower head of Coll. No. 1988, Erigeron subtrivervis |
 Coll. No. 2240, Erigeron subtrinervis |
Erigeron vetensis Rydb. Early Bluetop Fleabane. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial, 4 to 12 cm., sparse multicellular hairs, spreading to tangled, with clear crosswalls to 0.8 mm., plus very small (<0.1 mm.) peg-like glands, throughout; Leaves, basal, petiole 45 mm. + blade 65 mm. × 5 mm. wide, narrowly oblanceolate, cauline, reduced in size, #4-5, sessile, 8-15 mm. × 1.3-2.1 mm. wide, narrowly oblanceolate, entire; Inflorescence, scapose, 21 cm.; Heads, mostly borne singly; Involucre, 5 mm. × 11 mm. wide; Phyllaries, subequal, in 2 rows, 5 mm. × 0.7 mm. wide, margins not ciliate, tip acuminate; Flowers of 2 kinds, Ray flowers, fertile, corolla, 5-11 mm. × 1-1.6 mm. wide, ±white to blue, fading blue; Disk flowers, corolla, 4.0 mm., yellow, lobes triangular, style branch appendages triangular; Pappus, short (0.3 mm.) and long (2.2 mm.) capillary bristles; Cypsela, 1.5-1.6 mm. (Described from Coll. No. 1421, 10 Jun 2016; 3562, 16 April 2026 ).
- Dispersed Camp Site #8,
Soil of coarse decomposed granite, with Artemisia frigida, Packera fendleri, Ceanothus fendleri, and miscellaneous unidentifiable grasses.
This area burned by Hayman Fire (2002), mapped as moderate intensity here, no trees re-established in immediate vicinity.
Flat between Dispersed Camp #8 and a point of rocks 700 m. to the south southeast, 9.4 road miles generally southwest of Deckers by way of County Road 126 and Pike-San Isabel Forest Road 211.
Tom Schweich 3562.
16 Apr 2026.
(
FLD
REGIS
)
.
.
 Coll. No. 3562, Erigeron vetensis. |
 Coll. No. 3562, Erigeron vetensis. |
 Coll. No. 2465, Erigeron vetensis |
 Coll. No. 2943, Erigeron vetensis. |
 Coll. No. 1421, Erigeron vetensis |
Gaillardia aristata Pursh. Blanketflower. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 40 cm.; Leaves, alternate, entire to toothed; Inflorescence, single heads on peduncles 13-18 cm., flowers of 2 kinds; Phyllaries, 2+ series, 17 mm. × 2.7 mm. wide, lance-linear; Receptacle, epaleate, setae, to 10 mm.; Rays, sterile, corolla, 21 mm. × 10 mm. wide, yellow, deeply 3-lobed; Disk flowers, corolla, 7 mm., purple; Pappus of 6+ aristate scales, 4 mm., awn 2×> body. Described from Coll. No. 1205, 12 Jul 2015.
- North Twin Creek, 4225. 7/2/2025. .
- Twin Creek,
4184.
6/18/2025.
.
.
 Gaillardia aristata on Dakota Ridge. |
 Coll. No. 1665, Gaillardia aristata |
 Flowerhead of Coll. No. 1454, Gaillardia aristata |
Gutierrezia sarothrae (Pursh) Britton & Rusby. (Syn: G. linearifolia Lag. ) Broom Snakeweed. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial, tap-rooted, to 9 cm.; Leaves, alternate, linear, 20 mm. × 1 mm. mm. wide, dotted with embedded oil glands, very few short hairs; Peduncle, 0.5-1.5 mm.; Inflorescence, some flowers with strap-shaped corollas, flowers of two kinds in same heads, Involucre, 3.5 mm. × 2.5-3.0 mm. wide, obconic, not gummy; Phyllary, 2-3 unequal series, inner folded around ovary of ray flowers, dotted with embedded oil glands, tips appressed; Receptacle, epaleate; Rays, #5, yellow; Disk, #4; Pappus, a well-developed crown of scales on both ray and disk flowers; (Described from Coll. No. 144, 3 Oct 1997: keys easily to Gutierrezia sarothrae. However, inner phyllaries are folded around ovary of ray flowers, a character not mentioned in keys or description.)
- Twin Creek,
6228.
6/26/2026.
.
.
Heterotheca foliosa (Nutt.) Shinners. (Syn: Heterotheca villosa (Pursh) Shinners var. foliosa (Nutt.) V.L. Harms ) Hairy False Goldenaster. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial, to 40 cm.; Stem, spreading hairy, glandular; Leaves, cauline, alternate, 33 mm. × 9 mm. wide, oblong, margin entire, tip acute, appressed hairy; Peduncle, 15 mm.; Bracts, leafy, 10-16 mm. × 2.5 mm., lanceolate, some exceeding heads by 4-7 mm.; Involucre, 9 mm. × 14 mm. wide; Phyllaries, in 4+ graduated series, 4-9 mm. × 1 mm. wide, lanceolate, slightly keeled proximally, mostly green, abaxial surface glandular and hairy, margin hairy; Receptacle, epaleate, short (0.5 mm.) scales; Flowers, 2 kinds; Rays, sterile, corolla, 11 mm., yellow; Disk flowers, corolla, 7 mm., yellow; Pappus, short (0.6 mm.) and long (6 mm.) bristles, ≥disk corolla; cypsela, 1.3 mm., hairy. Described from Coll. No. 1258, 26 Jul 2015.
- North Twin Creek,
Forest floor, tall ponderosa pine and Douglas fir that appear to have survived the Hayman Fire (2002)
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.
Tom Schweich 3466.
21 Jul 2025.
(
CAS
CS
EIU
FLD
)
.
.
 Coll. No. 1258, Heterotheca foliosa |
 Inflorescence of Coll. No. 2177, Heterotheca foliosa |
Heterotheca villosa (Pursh) Shinners var. minor (Hook.) Semple. Hairy False Goldenaster. CalPhotos. Jepson eFlora. SEINet Taxon.
- Dispersed Camp Site #2,
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.
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.
Tom Schweich 3376.
12 Sep 2024.
(
KHD
)
.
.
 Fruit of Coll. No. 3376, Heterotheca villosa var. minor. |
Hieracium fendleri Sch.-Bip. Fendler's Hawkweed. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 6188. 6/12/2026. Thin, probably unburned, ponderosa pine/Douglas fir forest, in thin pine needle duff with Artemisia frigida, Ribes cereum, Geranium cespitosum, and Cercocarpus montanus. Uncommon; two other plants seen within a 1000 m. radius. Within the perimeter of the Hayman Fire (2002); this location mapped as moderate intensity. In a "cove" formed by outcrops of Pikes Peak granite, about 200 m. north/above the crossing of North Twin Creek by Forest Road 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. Tom Schweich 3570. 15 May 2026. ( KHD ) .
- Twin Creek,
6224.
6/26/2026.
.
.
 Typical appearance and habitat of Hieracium fendleri in the vicinity of the Twin Creeks. |
 Flower of Hieracium fendleri. |
 Distribution of Hieracium fendleri vouchers. |
 Coll. No. 3570, Hieracium fendleri. |
Hymenothrix dissecta (A. Gray) B. G. Baldwin. (Syn: Amauriopsis dissecta (A. Gray) Rydb. , Bahia dissecta (A. Gray) Britton ) Ragleaf Bahia. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 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. 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. Tom Schweich 3495. 18 Aug 2025. ( CAS ) .
- Dispersed Camp Site #2,
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.
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.
Tom Schweich 3374.
12 Sep 2024.
(
KHD
)
.
.
 Coll. No. 3495, Hymenothrix dissecta. |
 Coll. No. 3374, Hymenothrix dissecta. |
 Coll. No. 3495, Hymenothrix dissecta. |
Leucanthemum vulgare (Vaill.) Lam. (Syn: Chrysanthemum leucanthemum L. ) Ox-eye Daisy. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
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 (Described from Coll. No. 3289 & 3290, 3 Jul 2024).
- North Twin Creek,
Shade of willows.
This area burned in the Hayman Fire of 2002.
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.
Tom Schweich 3514.
3 Sep 2025.
(
CAS
COLO
CS
UCR
)
.
.
 Coll. No. 3290, Leucanthemum vulgare. |
Liatris punctata Hook. Dotted Blazing Star. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 32 cm.; Leaves, cauline, alternate, 78 mm. × 3.5 mm. wide, gradually reduced above, linear, glandular punctate, margins, entire, revolute, sparsely hairy; Inflorescence, single heads in axils on short pedicels; Involucre, 16 mm. × 7 mm. wide, ±cylindrical; Phyllaries, in 2+ series, inbricate, 14 mm. × 3.8 mm. wide, glandular-punctate abaxially distally, margin, ciliate, scarious, tip acute; Receptacle, epaleate; Flowers, one kind; Disk flowers; Corolla, tube white 8 mm. + lobes purple 2.5 mm.; Pappus, bristles, one series, 10 mm., plumose; Cypsela, 7 mm., hairy. Described from Coll. No. 1264, 29 Jul 2015.
- North Twin Creek, 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. 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. Tom Schweich 3496. 18 Aug 2025. ( CAS ) .
- Dispersed Camp Site #2,
3889.
9/12/2024.
.
.
 Coll. No. 1736, Liatris punctata |
 Coll. No. 3195, Liatris punctata. |
 Inflorescence of Coll. No. 1264, Liatris punctata |
 Coll. No. 1264, Liatris punctata |
Packera fendleri (A. Gray) W.A. Weber & Á. Löve. (Syn: Senecio fendleri A. Gray ) Fendler’s Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 6068. 5/15/2026. loose grus between outcrops of Pike Peak granite,with Artemisia frigida, Ribes cereum, Rubus deliciosus, and Verbascum thapsus Tom Schweich 3572. 15 May 2026. ( Undist. ) .
- Tarryall Mountains, East Slope, Sunny south-facing hillside in ponderosa forest. Originally ID as Senecio fendleri. Lost Creek Project. Lost Creek Area, Tarryall Mtns., 80 km (50 mi) southwest of Denver and 80 m northwest of Colo. Springs. Near Goose Creek trailhead. P. Murphy 79143. 9 July 1979. ( COLO114942‡ ) .
- Twin Creek,
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.
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.
Tom Schweich 3412.
18 Jun 2025.
(
OBI
)
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.
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.
Tom Schweich 3413.
18 Jun 2025.
(
CAS
COLO
)
.
.
Packera werneriifolia (A. Gray) W. A. Weber & Á. Löve. (Syn: Senecio werneriifolius (A. Gray) A. Gray ) Hoary Groundsel. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, 9-10 cm., tap-rooted; Stem, green, lanate-tomentose throughout; Leaves, cauline, appearing basal, blade, narrowly oblanceolate, 70 mm. × 4 mm. wide, abruptly reduced, giving plant scapose appearance, abaxial, glabrate, adaxial, thinly tomentose, margins, entire, revolute; Inflorescence, flat-topped, heads, #7-10 per stem, not overtopped by leaves; Peduncles, 3-22 mm., tomentose; Involucre, 8 mm. × 8 mm. wide, ovoid, tomentose; Phyllaries, in 2 series, non-imbricate and appearing to be a single series, 6.5 mm. × 1 mm. wide, flat, not clasping ray ovaries, tip, acute, margins of inner phyllaries scarious, calyculi present, green; Flowers, 2 kinds; Ray flowers, #9, tube 3 mm. + blade 4.5 mm. × 2 mm. wide, yellow, fertile; Disk flowers, #40-50, tube 4 mm. + lobes 0.5 mm., yellow, throat expanding gradually; Pappus, many well-developed bristles, 5 mm., ±unequal; Cypsela, immature, 1.5 mm. × 0.5 mm. wide, green, glabrous, beakless. (Described from Coll. No. 2467, 23 May 2021)
- Dispersed Camp Site #8,
4584.
4/16/2026.
4586.
4/16/2026.
Between a down log from the Hayman fire (2002), an Oxytropis (O. sericea?), and an unidentifiable grass. Nearby: Oreocarya virgata, Arctostaphylos uva-ursi, Pulsatilla nuttalliana, and Populus tremuloides.
This area burned by Hayman Fire (2002), mapped as high intensity here.
Near the top of a point of rocks about 700 m. south southeast of Dispersed Camp #8, 9.4 road miles generally southwest of Deckers by way of County Road 126 and Pike-San Isabel Forest Road 211.
Tom Schweich 3565.
16 Apr 2026.
(
UCR
)
.
.
Pericome caudata A. Gray. Mountain Tail-Leaf. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
Fracture in bare granite.
This area burned in the Hayman Fire of 2002.
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.
Tom Schweich 3501.
18 Aug 2025.
(
CAS
)
.
.
Pseudognaphalium macounii (Greene) Kartesz. Macouns Rabbit-Tobacco. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Annual (?) to 45 cm.; Leaves, cauline, alternate, 40 mm. × 4 mm. wide, decurrent, lance-linear, entire, stalked glandular, tomentose abaxially; Inflorescence, branched axial and terminal; Heads in tight clusters, disciform; Involucre, 4 mm.; Receptacle, epaleate; Phyllaries in 4+ series, hyaline; Pappus, bristles. Described from Coll. No. 1257, 26 Jul 2015.
- North Twin Creek,
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.
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.
Tom Schweich 3490.
18 Aug 2025.
(
OBI
)
.
.
 Habitat of Coll. No. 1257, Pseudognaphalium macounii |
 Coll. No. 3490, Pseudognaphalium macounii |
 Coll. No. 1257, Pseudognaphalium macounii |
Rudbeckia hirta L. var. pulcherrima Farw. Black-Eyed Susan. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, 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. 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. Tom Schweich 3433. 2 Jul 2025. ( COLO CS FLD ) .
- Twin Creek,
6232.
6/26/2026.
.
.
 Coll. No. 3433, Rudbeckia hirta var. pulchellum |
 Coll. No. 2635, Rudbeckia hirta var. pulcherrima |
 Coll. No. 3433, Rudbeckia hirta var. pulcherrima. |
Rudbeckia laciniata L. var. ampla (A. Nelson) Cronquist. Cut-Leaf Coneflower.. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
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.
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.
Tom Schweich 3431.
2 Jul 2025.
(
UCR
)
.
.
 Coll. No. 2650, Rudbeckia laciniata var. ampla. |
Senecio spartioides Torr. & A. Gray. (Syn: S. multicapitatus Greenm. ex Rydb. ) Broomlike Ragwort. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 50 cm.; Leaves, basal, unknown, cauline, alternate, 90 mm. × 3 mm. wide, narrowly oblanceolate, reduced above to 30 mm. × 1 mm. wide, variously hairy in axils and ±lower surface; Involucre, 12.5 mm. × 6 mm., narrowly campanulate, bractlets not prominent; Phyllaries, 2 series? or 1 series with 2 forms? outer, 7.5 mm. × 0.7 mm. wide, all green, inner, 7.5 mm. × 1.3 mm. wide, centrally green with margins chartaceous, all tips dark; Receptacle, epaleate; Rays, fertile, corolla, tube 5 mm. + blade 9 mm. × 2 mm. wide, yellow, lobes 3; Disk flowers, corolla, 6 mm., yellow; Pappus, 1 series of fine capillary bristles, 5 mm.; Cypsela, 4 mm., 5-angled, dark gray, “hirtellous” throughout (not just the angles). Described from Coll. No. 1298, 23 Sep 2015.
- North Twin Creek, 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. 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. Tom Schweich 3499. 18 Aug 2025. ( OBI ) .
- Dispersed Camp Site #2, 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. 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. Tom Schweich 3371. 12 Sep 2024. ( CAS ) .
- Twin Creek,
determination tentative.
6218.
6/26/2026.
.
.
Solidago missouriensis Nutt. Missouri Goldenrod. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 35-40 cm., generally glabrous throughout; Leaves, basal, unknown, cauline, alternate, petiole 10-45 cm. + blade 100 mm. × 21-22 mm. wide, reduced above, oblanceolate, margin, sparsely scabrous proximally, serrate distally, glabrous, prominently 3(5)-nerved; Inflorescence, crowded panicle; Pedicels, 1 mm.; Bracts, #2, 1.8 mm.; Involucre, 3.0-4.5 mm. × 3-5 mm. wide, obconic; Phyllaries, 2+ series, 2.2-3.5 mm. × 1 mm. wide, graduated, green, margin chartaceous, veins 1; Receptacle, epaleate, conic; Flowers, 2 kinds; Rays, #12, fertile, tube 2 mm. + blade 2.2 mm., yellow; Disk flower, #12, tube 2.8 mm. + lobes 0.7 mm. = 3.5 mm., yellow; Pappus, capillary bristles, 3.0 mm.; Cypsela, 0.4-0.6 mm., glabrous-sparsely hairy. Described from Coll. No. 1255, 26 Jul 2015, and Coll. No. 1519, 29 Jul 2016. Distinguished in part by its glabrous characters and presence of 3 prominent nerves on leaves. Jepson eFlora notes that S. missouriensis Nutt. Is misapplied to S. spectabilis (D. C. Eaton) A. Gray. FNANM states that, in the west, it can be similar to smaller plants of S. spectabilis (13 Sep 2014).
- North Twin Creek, 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. 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. Tom Schweich 3471. 31 Jul 2025. ( CAS KHD UCR ) 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. 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. Tom Schweich 3497. 18 Aug 2025. ( CAS ) .
- Dispersed Camp Site #2,
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.
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.
Tom Schweich 3375.
12 Sep 2024.
(
OBI
UCR248676‡
)
.
.
Symphyotrichum foliaceum (DC.) G. L. Nesom var. parryi (D. C. Eaton) G. L. Nesom. Parry's Aster. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 12 cm., long rhizomatous; Stem, proximal glabrate, hairy in lines decurrent from leaf bases, hairy in inflorescence; Leaves, basal and cauline, alternate, petiole 20 mm. + blade 90 mm. × 22 mm. wide, reduced distally, entire, ciliate, tips, rounded; Inflorescence, heads 1-4 per stem, ≥leaves; Involucre, 8 mm. × 12 mm. wide, hemispheric; Phyllaries, graduated, 3±-series, chartaceous base to tip green, eglandular, margins, flat, somewhat ciliate, tip, acute, some reflexed(?); Receptacle, epaleate; Flowers, of 2 kinds; Ray flowers, many, tube 2 mm. + blade 10 mm. × 1.7 mm. wide, white, some tinged lavender, fading to lavender, fertile; Disk flowers, many, tube 4.5 mm. + lobes 0.5 mm., yellow; Pappus, many, bristles, 3.0-3.7 mm., ±equal; Cypsela, 2.5 mm. × 0.5 mm. wide, light brown, sparsely hairy (Described from Coll. No. 2728, 18 Aug 2021).
- Twin Creek,
With Bouteloua gracilis.
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.
Tom Schweich 3508.
3 Sep 2025.
(
KHD
)
.
.
 Coll. No. 2728, Symphyotrichum foliaceum var. parryi as it came out of the press. |
 Coll. No. 2728, Symphyotrichum foliaceum var. parryi |
 Coll. No. 3508, Symphyotrichum foliaceum var. parryi. |
Symphyotrichum porteri (A. Gray) G.L. Nesom. (Syn: Aster porteri A. Gray ) Smooth White Aster. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 35 cm., eglandular, generally not hairy; Stem ascending; Leaves, cauline, alternate, sessile, 53 mm. × 3 mm. wide, lance-linear, many rolled, tip pointed, maybe spinulose, generally glabrous except some distal margins; Inflorescence, crowded, ±flat-topped; Heads borne simgly on short pedicels; Involucre, 5 mm. × 8 mm. wide; Phyllaries, 2+series, 3.5 mm. × 0.7 mm. wide, ±equal, inner ≥ outer, mid-vein green, margins white proximally, green distally, tip acute; Receptacle, epaleate, convex (if not conic); Flowers of two kinds; Rays, fertile, corolla, 6.5 mm., white; Disk flowers, corolla, 3.0 mm., yellow; Pappus, bristles, barbed, single, 2.5 mm.; Cypsela, 0.7 mm., sparsely hairy. Described from Coll. No. 1266, 29 Jul 2015.
- North Twin Creek, 4386. 8/18/2025. .
- Dispersed Camp Site #2, Thin ponderosa pine forest with Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Castilleja integra, Eriocoma nelsonii, and Vulpia octoflora. 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. Tom Schweich 3383. 12 Sep 2024. ( KHD83591‡ ) .
- Twin Creek,
Southwest facing slope. Also here: Artemisia frigida, Senecio spartioides, Cercocarpus montanus, Verbascum thapsus, Bouteloua gracilis, and Eriocoma robusta.
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.
Tom Schweich 3506.
3 Sep 2025.
(
FLD
UCR
)
.
.
Townsendia grandiflora Nutt. Largeflower Townsend Daisy. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 15 cm.; Stem, villous; Leaves, opposite below, alternate above, 32-43 mm. × 3 mm. wide, narrowly oblanceolate, long ciliate at base; Inflorescence, heads borne singly; Involucre, 12 mm. × 25 mm. wide; Phyllaries, 5+ imbricate series, 13 mm. × 2.5-3.0 mm. wide, ±equal, ovate, margin ciliate, tip acuminate, green around prominent mid-vein, chartaceous margins; Receptacle, flat, epaleate, very short bristles; Flowers of two kinds; Rays, sterile, pappus, scales, 0.6 mm., corolla, 14-21 mm. × 1.2-1.5 mm. wide, white with purple center; Disk, 14-21 mm. wide, pappus, bristles, 4.0 mm., corolla, 4.5-5.0 mm., yellow; cypsela, 4 mm. × 1.3 mm., laterally compressed (Described from Coll. No. 1247, 24 Jul 2015, and Coll. No. 1404, 8 June 2016).
- Dispersed Camp Site #2,
Thin ponderosa pine forest with Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Castilleja integra, Eriocoma nelsonii, and Vulpia octoflora.
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.
Tom Schweich 3382.
12 Sep 2024.
(
KHD
)
.
Betulaceae
Alnus incana (L.) Moench ssp. tenuifolia (Nutt.) Brietung. Thinleaf Alder. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek,
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.
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.
Tom Schweich 3511.
3 Sep 2025.
(
JCOS s.n.
KHD
OBI
UCR
)
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.
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.
Tom Schweich 3512.
3 Sep 2025.
(
KHD
)
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.
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.
Tom Schweich 3512.1
3 Sep 2025.
(
COLO
)
.
.
 Coll. No. 3511, Alnus incana ssp. tenuifolia |
 Coll. No. 3512, Alnus incana ssp. tenuifolia. |
Betula occidentalis Hook. (Syn: Betula fontinalis Sarg. ) Water Birch. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
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.
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.
Tom Schweich 3435.
2 Jul 2025.
(
CAS
FLD
OBI
UCR
)
.
 Water Birch (Betula occidentalis) along Clear Creek. |
 Coll. No. 3435, Betula occidentalis. |
 Coll. No. 2644, Betula occidentalis. |
Boraginaceae
Hackelia floribunda (Lehm.) I. M. Johnst. Many-Flowered Stickseed. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
4388.
9/3/2025.
.
.
 Coll. No. 2849, Hackelia floribunda. |
 Coll. No. 2849, Hackelia floribunda. |
Lithospermum multiflorum Torrey ex A. Gray. Many Flowered Stoneseed. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial cleistogamous flowers absent. Flowers heterostyled and dimorphic.
- Molly Gulch, 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. 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. Tom Schweich 3400. 18 Jun 2025. ( CAS EIU FLD OBI ) .
- Dispersed Camp Site #2,
3886.
9/12/2024.
.
.
Mertensia ciliata (Torr.) G. Don var. ciliata. Tall Fringed Bluebells. CalPhotos. Jepson eFlora. SEINet Taxon.
Variety ciliata accepted in Colorado beginning with Ackerfield (2nd edition, 2022).
- North Twin Creek, 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. 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. Tom Schweich 3437.1 2 Jul 2025. ( FLD UCR ) . .
Oreocarya virgata (Porter) Greene. (Syn: Cryptantha virgata (Porter) Payson ) Miner"s Candle. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, occasional 4223. 7/2/2025. 4383. 8/18/2025. .
- Dispersed Camp Site #8, 4588. 4/16/2026. .
- Tarryall Mountains, East Slope, Sunny south-facing hillside in ponderosa forest. Lost Creek Project; Miner's candle. Originally identified as Cryptantha virgata. Handwritten note says = Oreocarya. Lost Creek Area, Tarryall Mtns., 80km (50mi) southwest of Denver and 80km northwest of Colo. Springs, near Goose Creek trailhead. P. Murphy 79144. 9 Jul 1979. ( COLO429233‡ ) .
- Twin Creek, 6220. 6/26/2026. . .
Phacelia Juss. Phacelia. CalPhotos. Jepson eFlora. SEINet Taxon.
- Dispersed Camp Site #8,
4592.
4/16/2026.
.
.
 Phacelia pedicellata A. Gray at Lobo Point |
 Phacelia in my garden. |
 Pretty little Phacelia in the Mid Hills Campground. |
 Coll. No. 402, Phacelia distans |
Phacelia hastata Douglas ex Lehm. Silverleaf Phacelia. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 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. 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. Tom Schweich 3494. 18 Aug 2025. ( KHD ) .
- Twin Creek,
determination tentative.
6219.
6/26/2026.
.
.
 Coll. No. 2081, Phacelia heterophylla |
 Coll. No. 3494, Phacelia hastata. |
Phacelia heterophylla Pursh. Varileaf Phacelia. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Described by Pursh (1814) from a collection by M. Lewis Jun-Jul, 1806 on the banks of the Kooskooskie (Clearwater) River.
- Tarryall Mountains, East Slope,
Cheeseman Lake 7.5" Quadrangle. Along the Forest Road #211 roadside.
Stephen B. Austin 836.
23 Jul 2013.
(
KHD59788‡
)
.
 Habitat of Coll. No. 1138, Phacelia heterophylla |
Coll. No. 2081, Phacelia heterophylla |
Brassicaceae
Erysimum capitatum (Hook.) Greene. Sanddune Wallflower. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial or at least biennial, 16 cm. 25-45 cm., hairs dolabriform throughout; Root, tap; Stems, erect, leafy, proximal not woody hairs as above; Leaves, basal and cauline, basal, petiole, indistinct, ±10 mm., + blade, 50-100 mm. × 2.5-3 mm. wide, narrowly oblanceolate, margin 1-3 shallowly pinnate dentate, cauline, nearly sessile, 42 mm. × 2.5 mm. wide, ±linear, margin, entire, reduced distally; Inflorescence, raceme 130 mm. × 45 mm. wide, not bracted; Pedicels, 3-6 mm., elongating as flower matures, ascending; Flowers, radial; Sepals, #4, rows, 1, 7 mm. × 1-1.5 mm. wide, narrow and wide pairs opposite, lateral pair basally saccate; Petals, claw, 10-11 mm. + blade 6-9 mm. × 4-6 mm. wide, spoon-shaped, margin, entire, color, yellow, orange; Stamens, #6, 11 & 15 mm., tetradynamous (2 short, 4 long); Anthers, 4.5 mm.; Ovary, 4 mm.; Style, 9 mm.; Stigma, capitate; Fruit, 17-34 mm. × 1 mm. wide, 4-angled, ascending, hairy as above; Seeds, unknown (Described from Coll. Nos. 206, 1835, & 2306).
- Twin Creek,
4189.
6/18/2025.
.
Cactaceae
Pediocactus simpsonii (Engelm.) Britton & Rose. (Syn: Echinocactus simpsonii Engelm. , Pediocactus simpsonii (Engelm.) Britton & Rose var. minor (Engelm.) Cockerell ) Mountain Ball Cactus. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Dispersed Camp Site #8,
4583.
4/16/2026.
4587.
4/16/2026.
.
Campanulaceae
Campanula rotundifolia L. (=Campanula petiolata A. DC.) Harebell. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 40 cm.; Leaves, basal, ?, cauline, alternate, ±lance-linear, 52 mm. × 2.5 mm. wide; Inflorescence, solitary and loose racemes; Pedicel, 9 mm.; Calyx, tube 2.5 mm. + 5 lobes 2.5 mm. = 5.0 mm.; Corolla, 13 mm, blue-purple; Capsule, nodding, 5.5 mm. × 4.5 mm. wide, opening by pores near the base. Described from Coll. No. 1246, 24 July 2015.
- North Twin Creek, 4382. 8/18/2025. .
- Dispersed Camp Site #2,
3890.
9/12/2024.
.
 Coll. No. 2151, Campanula rotundifolia |
 Coll. No. 1246, Campanula rotundifolia |
Cannabaceae
Humulus neomexicanus (A. Nelson & Cockerell) Rydb. New Mexican Hops. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek,
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.
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.
Tom Schweich 3411.
18 Jun 2025.
(
KHD
OBI
)
.
Caprifoliaceae
Lonicera involucrata (Richardson) Banks ex Spreng. Twinberry Honeysuckle. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tarryall Mountains, East Slope,
Stream bank shrub
Wigam Ranch, Colorado
John B. Hartwell 708.
4 Jul 1937.
(
KHD13231‡
)
.
 Coll. No. 3121, Lonicera involucrata. |
Caryophyllaceae
Eremogone fendleri (A. Gray) Ikonnikov. (Syn: Arenaria fendleri A. Gray ) Fendler's Sandwort. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, tufted, to 30 cm.; Stem, proximal glabrous, distal short glandular hairy “peg-like hairs”; Leaves, mostly basal, cauline, stipules absent, opposite, 50 mm. × 0.5 mm. wide, linear to needle-like, erect to appressed, margin finely scabrous, tip small spinulose; Inflorescence, open cyme; Pedicels, 3-8 mm.; Sepals, #5 distinct, 4.5-5.0 mm. × 1 mm. wide, glandular hairy (or stipitate glandular); Petals, white, 5 mm., entire; Stamens, #10; Anthers, purple; Styles, #3. Described from Coll. No. 1270, 1374, and 2372.
- Dispersed Camp Site #2, 3891. 9/12/2024. .
- Twin Creek,
4192.
6/18/2025.
.
.
 Habitat of Coll. No. 3264, Eremogone fendleri |
 Coll. No. 1270, Eremogene fendleri |
Paronychia jamesii Torr. & A. Gray. James' Nailwort. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial erect subshrub, to 15 cm.; Leaves, cauline, opposite, 10 mm., linear, pointed, stipules, 4-5 mm., papery; Inflorescence, many-flowered cyme; Sepals, #5, 2.3 mm., greenish, awn-tipped; Petals, absent. Described from Coll. No. 1263, 29 July 2015.
- North Twin Creek,
4373.
8/18/2025.
.
.
 Paronychia jamesii as seen on top of North Table Mountain |
 Inflorescence of Coll. No. 1263, Paronychia jamesii |
 Coll. No. 1263, Paronychia jamesii |
Stellaria longipes Goldie. Longstalk Starwort. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek, 6204. 6/26/2026. .
Chenopodiaceae
Chenopodium leptophyllum (Moq.) Nutt. ex S. Watson. Narrowleaf Goosefoot. CalPhotos. Jepson eFlora. SEINet Taxon.
Annual, to 80 cm., scaly or powdery throughout; Stem, not jointed, striated; Leaves, weakly fleshy, flattened, primary, 31 mm. × 3.5 mm., lance-linear, 1-veined from base, top acute to rounded, not spine-tipped, short-petioled to sessile, distal not clasping; Flowers, bisexual, calyx lobes 5, appendages 0, condition in fruit unknown; Stamens 5; Ovary superior; Stigma branches 2; Seeds not available, assumed to be horizontal (Described from Coll. No. 1012, 22 July 2013).
- Twin Creek,
Also here: Artemisia frigida, Senecio spartioides, Euphorbia serpyllifolia, Cercocarpus montanus, Verbascum thapsus, Bouteloua gracilis, and Eriocoma robusta.
Along an old road into Twin Creek from F. R. 211, 11.8 km. southwest of Deckers.
Tom Schweich 3503.
3 Sep 2025.
(
KHD
)
.
Cornaceae
Cornus canadensis L. (Syn: Chamaepericlymenum canadense L.) Asch. & Graebn. ) Bunchberry Dogwood. CalPhotos. Jepson eFlora. SEINet Taxon.
- Tarryall Mountains, East Slope, In moist soil along creek in the shade of large Pseudotsuga. Pike National Forest. Growing along Goose Creek. Mark Duff 131. 14 Aug 1992. ( COLO253427‡ ) . .
Cornus sericea L. ssp. sericea. (Syn: C. stolonifera Michaux ) Creek Dogwood. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek,
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.
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.
Tom Schweich 3401.
18 Jun 2025.
(
KHD
OBI
UCR
)
.
 Coll. No. 3401, Cornus sericea ssp. sericea. |
 Coll. No. 698, Cornus sericea ssp. sericea |
Crassulaceae
Sedum lanceolatum Torr. (Syn: Amerosedum lanceolatum (Torr.) A. Löve & D. Löve ) Spearleaf Stonecrop. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Type collected by Edwin James on the Long Expedition, described by Torrey, 1827.
- North Twin Creek,
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.
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.
Tom Schweich 3416.
18 Jun 2025.
(
FLD
)
very sparse Douglas fir and ponderosa pine forest floor
Tom Schweich 3606.
12 Jun 2026.
(
Undist.
)
.
Ericaceae
Arctostaphylos uva-ursi (L.) Sprengel. (Syn: Arctostaphylos uva-ursi (L.) Sprengel ssp. adenotricha (Fernald & J.F.Macbr.) Calder & Roy L.Taylor ) Bearberry. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 4377. 8/18/2025. 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. 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. Tom Schweich 3461. 21 Jul 2025. ( FLD ) Small trees in an open ponderosa pine forest. This area mapped as unburned within the perimeter of the Hayman Fire (2002). 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. Tom Schweich 3472. 21 Jul 2025. ( CS REGIS ) .
- Dispersed Camp Site #2, 3894. 9/12/2024. .
- Dispersed Camp Site #8, 4589. 4/16/2026. .
- Tarryall Mountains, East Slope,
Plants forming low mats, open ponderosa -douglas fir forest on Pike's Peak granite gravel substrate. Abundant and widespread.
Front Range, Tarryall Mountains, South Platte River below Cheeseman Reservoir. Along jeep trail about 1 miles E of Pike National Forest rd 211, 2 miles W of South Platte River at the head of Wildcat Creek.
Loraine Yeatts 1264.
4 May 1986.
(
KHD30608‡
)
.
Euphorbiaceae
Euphorbia brachycera Engelm. (Syn: Tithymalus brachyceras (Engelm.) Small ) Horned Spurge. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial, to 25-30 cm., glabrous throughout; Stem, erect, herbaceous; Leaves, alternate, sessile, lanceolate, 16 mm. × 8 mm. wide, margin entire, tip acute, green throughout; Flowers, arranged in a cyathium, glands entire with “horns” on either side. (Described from Coll. No. 2485, 2 June 2021.)
- North Twin Creek,
deep grus between outcrops of Pikes Peak granite, with Artemisia frigida, Geranium cespitosum, and Cercocarpus montanus
Tom Schweich 3571.
15 May 2026.
(
Undist.
)
.
.
Euphorbia serpillifolia Pers. (Syn: Chamaesyce s. (Pers.) Small ) Thymeleaf Sandmat. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek,
Also here: Artemisia frigida, Senecio spartioides, Chenopodium leptophyllum, Cercocarpus montanus, Verbascum thapsus, Bouteloua gracilis, and Eriocoma robusta.
Edge of a drying mud puddle in an old road between Twin Creek and F. R. 211, 11.8 km. southwest of Deckers.
Tom Schweich 3505.
3 Sep 2025.
(
KHD
)
.
.
 Coll. No. 3505, Euphorbia serpillifolia. |
Euphorbia virgata Engelm. (Syn: Euphorbia esula L. [misapplied] , Euphorbia esula L. [misapplied] var. uralensis (Fisch. ex Link) Dorn ) Leafy Spurge. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek,
large patch
6226.
6/26/2026.
.
 Euphorbia virgata “Leafy Spurge” on a ridge above Twin Creek. |
Fabaceae
Astragalus . Milkvetch. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
Tom Schweich 3581.
15 May 2026.
(
Undist.
)
.
.
 Locoweed in the Mid Hills Campground |
Astragalus shortianus [Nutt. ex] Torr. & A.Gray. Short's Milkvetch. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 10 cm., acaulescent; Leaves, compound, petiole, 50 mm., blade, 90 mm. × 37 mm. wide, leaflets, #13, 17 mm. × 10 mm. wide, terminal leaflet not a tendril, petiole, rachis, and leaflets with appressed stiff straight hairs; Inflorescence, not an umbel; Calyx, tube 6 mm. + lobes 4 mm., hairs similar; Flower, zygomorphic, banner 22 mm., wings 18 mm., clawed, keel, 22 mm., tip obtuse; Fruit, 35 mm. × 10 mm. wide, falcate, appressed stiff basifixed straight hairs (Described from Coll. No. 1826, 16 May 2018).
- North Twin Creek,
6189.
6/12/2026.
.
.
 Coll. No. 1405, fragments of an Astragalus, maybe A. shortianus |
 Pieces of Coll. No. 1826, Astragalus shortianus |
Oxytropis lambertii Pursh. Purple Locoweed. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, acaulescent, mostly dolabriform hairs (one arm much shorter than the other); Leaves, basal, pinnately compound, leaflets #17, terminal leaflet present; Inflorescence, raceme, peduncle 30 cm., pedicels very short; Bracts, 7 mm. × 1.6 mm. wide, green, lanceolate; Calyx, tube 7 mm. + lobes 4 mm. = 11 mm.; Flower, zygomorphic, various shades of magenta to purple, banner, 17 mm., wings, 16 mm., keel, 13 mm., blades united enclosing stamens, recurved beak; Stamens, #10, diadelphous (Described from Coll. No. 1385, 1 June 2016).
- North Twin Creek,
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.
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.
Tom Schweich 3415.
18 Jun 2025.
(
CAS
EIU
FLD
OBI
UCR
)
.
.
 Purple Locoweed (Oxytropis lambertii) on top of North Table Mountain. |
 Coll. No. 1385, Oxytropis lambertii |
 Coll. No. 3415, Oxytropis lambertii. |
Oxytropis multiceps Nuttall, Fl. N. Amer. (Torr. & A. Gray) 1(2): 341 (1838). Southwestern Locoweed. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Molly Gulch, Bare soil on bank above FR 211 with several mature ponderosa pines. Within the area of the Hayman Fire (2002) but mapped as unburned at this location. Bank above FR 211 about 100 m. north of the GNIS location of Molly Gulch, about 10.8 road miles generally southwest of Deckers, CO, by way of County Road 126 and Pike-San Isabel Forest Road 211. Tom Schweich 3566. 16 Apr 2026. ( CAS FLD ) .
- Tarryall Mountains, East Slope, Open poderosa-douglas fir forest on Pikes Peak granite gravel substrate. Abundant on W facing steep, gravelly roadside, common. Front Range, Yarrtall Mountains, South Platte River below Cheesman Reservoir, road cut along Pike National Forest Road 211, on hill above Goose Creek Campground. Loraine Yeatts 1263. 4 May 1986. ( KHD11306‡ ) .
- Twin Creek,
6231.
6/26/2026.
.
.
Thermopsis montana Nutt. var. divaricarpa (A. Nelson) Dorn. Spreadfruit Goldenbanner. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, Pinus scopulorum, Psendotsuga menziesii glauca, Artemisia frigida, Populus tremuloides, Bouteloua gracilis Tom Schweich 3568. 15 May 2026. ( Undist. ) . .
Trifolium pratense L. Red Clover. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, erect, to 50 cm., hairs not hooked at tips; Stem, spreading hairy; Stipules, 21 mm. × 5 mm. wide, connate, scarious with several green nerves; Leaves, ternately compound, leaflets, 38 mm. × 20 mm. wide, margins slightly wavy tip short mucronate (easier to see on young leaves), both sides long wavy hairy; Heads, sessile, subtended by stipules and a pair of leaves, many flowers; Fruit, unknown. Introduced. (Described from Coll. No. 1458, 27 June 2016.)
- North Twin Creek,
Shade of willows.
This area burned in the Hayman Fire of 2002.
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.
Tom Schweich 3513.
3 Sep 2025.
(
CAS
)
.
 Coll. No. 2122, Trifolium pratense |
 Inflorescence of Coll. No. 1458, Trifolium pratense |
 Inflorescence of Coll. No. 2122, Trifolium pratense |
Fumariaceae
Corydalis aurea Willd. Scrambled Eggs. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, in thin soil between outcrops of Pikes Peak granite with Artemisia frigida, Verbascum thapsus, and unidentfiable grasses. Tom Schweich 3576. 15 May 2026. ( Undist. ) .
- Tarryall Mountains, East Slope,
Disturbed site in mixed forest of Populus tremuloides/ Pseudotsuga menziesii/ Pinus ponderosa burned in Hayman Fire of 2002.
Lost Creek Wilderness Area, Pike National Forest, Hankins Gulch Trail, SW of Goose Creek trailhead.
Tim Hogan 5134.
3 Jun 2013.
(
COLO1818814‡
RMBL6329‡
)
.
Geraniaceae
Geranium caespitosum James. Pineywoods Geranium. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 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. 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. Tom Schweich 3421. 18 Jun 2025. ( KHD ) .
- Dispersed Camp Site #2,
3880.
9/12/2024.
.
.
Geranium richardsonii Fisch. & Trautv. Richardson's Geranium. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial, herbaceous, green & photosynthetic, to 60 cm.; Leaves, simple, palmately lobed, into 5-7 lobes, largest 44–57 mm. × 87–96 mm. wide, petioles 17–19 mm.; Inflorescence (cymules!) 2-flowered; Pedicels, 9–15 mm., hairs topped with purple glands (per Taylor, 2010); Flowers, open, radial, bisexual, in 5×n parts; Perianth, 2 whorls; Petals, 5, free, hairy ≤½ adaxial surface, 15 mm. × 7 mm. wide, white; tips rounded; Nectaries, not wooly or lanate (per TJM2 & Aedo, 2012), but few small straight hairs, without tuft of hairs on top; Stamens, 10, 2×petals; Ovary superior; Pistil 1; Stigmas, (in fruit) 3–4 mm.; Mericarp with basal callus (Described from Coll. No. 1014, 22 July 2013).
- North Twin Creek, 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. 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. Tom Schweich 3434. 2 Jul 2025. ( CS EIU FLD ) .
- Twin Creek,
stream bank, open shade
Tom Schweich, with Matt Schweich 3618.
27 Jun 2026.
.
 Coll. No. 1014, Geranium richardsonii |
 Coll. No. 1014, Geranium richardsonii |
 Coll. No. 2850, Geranium richardsonii. |
 Coll. No. 3434, Geranium richardsonii. |
Grossulariaceae
Ribes cereum Douglas. Wax Currant. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 4370. 8/18/2025. With Pinus scopulorum and Cercocarpus montanus Tom Schweich 2569. 15 May 2026. ( Undist. ) .
- Dispersed Camp Site #2, 3887. 9/12/2024. .
- Twin Creek,
small-leaved compared to those seen in metro-Denver
4175.
6/18/2025.
.
.
 Developing fruit on Ribes cereum. |
 Coll. No. 1091, Rubus deliciosus |
 Coll. No. 1092, Ribes cereum |
Ribes inerme Rydb. White Stem Gooseberry. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek,
4176.
6/18/2025.
.
 Coll. No. 3312, Ribes inerme. |
 Coll. No. 2504, Ribes inerme |
 Coll. No. 3071, Ribes inerme. |
Hydrangeaceae
Jamesia americana Torr. & A. Gray var. americana. Fivepetal Cliffbush. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, fide Coll. No. 3418. 4379. 8/18/2025. 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. 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. Tom Schweich 3418. 18 Jun 2025. ( CAS COLO UCR ) .
- Twin Creek,
6211.
6/26/2026.
.
Lamiaceae
Agastache urticifolia (Benth.) Kuntze. Nettle-Leaved Horse-Mint. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek, 6215. 6/26/2026. . .
Monarda fistulosa L. Wild Bergamot. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
4218.
7/2/2025.
4227.
7/2/2025.
.
.
 Coll. No. 1245, Monarda fistulosa growing in a patch of poison ivy. |
 Sea of Monarda fistulosa |
 Coll. No. 1201, Monarda fistulosa |
 Coll. No. 1697, Monarda fistulosa |
 Coll. No. 1697, Monarda fistulosa |
Prunella vulgaris L. Common Selfheal. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
4276.
7/21/2025.
.
.
 Coll. No. 1294, Prunella vulgaris |
 “Axillary” Inflorescence of Coll. No. 1294, Prunella vulgaris |
 Terminal Inflorescence of Coll. No. 1294, Prunella vulgaris |
Scutellaria brittonii Porter. Britton's Skullcap. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
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.
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.
Tom Schweich 3417.
18 Jun 2025.
(
FLD
)
.
Loasaceae
Mentzelia speciosa Osterh. (Syn: Nuttallia speciosa (Osterh.) Greene ) Plains Blazing Star. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 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. 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. Tom Schweich 3493. 18 Aug 2025. ( KHD ) .
- Tarryall Mountains, East Slope,
4278.
7/21/2025.
.
 Coll. No. 3493, Mentzelia speciosa. |
 Coll. No. 2866, Mentzelia speciosa. |
 Coll. No. 3492, Mentzelia speciosa. |
Montiaceae
Phemeranthus parviflorus (Nutt.) Kiger. (Syn: P. confertiflorus (Greene) Hershk. , Talinum confertiflorum Greene ) Sunbright. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Dispersed Camp Site #2,
dense in crack between boulders.
3878.
9/12/2024.
.
 Phemeranthus parviflorus on top of North Table Mountain. |
 Small plant seen on top of North Table Mountain |
 Coll. No. 1689.1, Phemeranthus parviflorus |
Onagraceae
Chamerion angustifolium (L.) Holub. (Syn: Epilobium a. L , Epilobium angustifolium L var. intermedium ) Fireweed. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek,
6222.
6/26/2026.
base of boulders
Tom Schweich, with Matt Schweich 3620.
26 Jun 2026.
(
Undist.
)
.
.
 Coll. No. 2640, Chamerion angustifolium. |
Circaea alpina L. Small Enchanter's Nightshade. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 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. 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. Tom Schweich 3432.1 2 Jul 2025. ( FLD ) .
- Twin Creek,
6221.
6/26/2026.
.
.
 Coll. No. 3081, Circaea alpina. |
 Coll. No. 2628.1, Circaea alpina |
Oenothera coronopifolia Torr. & A. Gray. Crownleaf Evening Primrose. Hierba de San Juan.. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
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.
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.
Tom Schweich 3443.
2 Jul 2025.
(
FLD
UCR
)
.
.
 Obs. No. 1599, Oenothera coronopifolia |
 Coll. No. 3443, Oenothera coronopifolia. |
 Coll. No. 2566, Oenothera coronopifolia |
Oenothera villosa Thunb. Hairy Evening Primrose. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 25 cm., ±straight hairy throughout; Stem, eglandular, villous, hairs with red pustular bases; Leaves, cauline, alternate, sessile, 55 mm. × 12 mm. wide, elliptical, reduced above, entire, very shallowly toothed; Inflorescence, leafy bracteate spike; Sepals, #4, 13 mm., reflexed; Floral tube, 24 mm.; Petals, #4, 9 mm. × 5 mm. wide, yellow fading pink, obovate, entire; Stigma, lobes #4; Capsules, 25-33 mm.; Seeds, 0.8 mm., squarish, glabrous throughout. Described from Coll. No. 1271, 29 July 2015.
- North Twin Creek,
4230.
7/2/2025.
.
 Coll. No. 1271, Oenothera villosa |
Orobanchaceae
Castilleja integra A. Gray. Wholeleaf Indian Paintbrush. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 6074. 5/15/2026. 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. 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. Tom Schweich 3422. 18 Jun 2025. ( FLD UCR ) .
- Dispersed Camp Site #2,
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.
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.
Tom Schweich 3378.
12 Sep 2024.
(
KHD83559‡
OBI
)
.
.
Orobanche fasciculata Nutt. (Syn: Aphyllon fasciculatum (Nutt.) Torr. & A. Gray ) Clustered Broomrape. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
on dry bank where N. Twin Creek crosses the Road.
4194.
6/18/2025.
.
Oxalidaceae
Oxalis stricta L. Common Yellow Oxalis. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek,
6229.
6/26/2026.
.
 Inflorescence of Coll. No. 1676, Oxalis stricta |
 Coll. No. 1676, Oxalis stricta |
Plantaginaceae
Linaria vulgaris Mill. Butter and Eggs. Weed: CO DofA, List: B. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, 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. 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. Tom Schweich 3441. 2 Jul 2025. ( CAS COLO UCR ) .
- Twin Creek,
Tom Schweich, with Matt Schweich 3617.
26 Jun 2026.
(
Undist.
)
.
.
 Coll. No. 3441, Linaria vulgaris. |
Penstemon virens Pennell ex Rydb. Front Range Beardtongue. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 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. 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. Tom Schweich 3414. 18 Jun 2025. ( FLD KHD UCR ) .
- Tarryall Mountains, East Slope,
Lost Creek Wilderness Area, Pike National Forest, Hankins Gulch Trail, SW of Goose Creek trailhead.
Lost Creek Wilderness Area, Pike National Forest, Hankins Gulch Trail, SW of Goose Creek trailhead.
Tim Hogan 5136.
3 Jun 2013.
(
COLO1818798‡
RMBL6352‡
)
.
.
Synthyris plantaginea (James) Benth. (Syn: Besseya plantaginea (James) Rydb. , Veronica plantaginea James ) White River Kittentails. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
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.
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.
Tom Schweich 3420.
18 Jun 2025.
(
OBI
UCR
)
.
.
 Coll. No. 3420, Synthyris plantaginea. |
Veronica . Speedwell. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek, cascade Tom Schweich, with Matt Schweich 3619.1 26 Jun 2026. ( Undist. ) . .
Veronica americana (Raf.) Benth. American Speedwell. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek,
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.
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.
Tom Schweich 3403.
18 Jun 2025.
(
KHD
)
.
 Habit of Coll. No. 1024, Veronica americana |
 Coll. No. 3086, Veronica americana. |
 Coll. No. 3403, Veronica americana. |
 Coll. No. 1024, Veronica americana |
Polemoniaceae
Aliciella pinnatifida (Nutt. ex A.Gray) J.M.Porter. (Syn: Gilia pinnatifida Nutt. ) Sticky Gilia. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek,
determination tentative
6216.
6/26/2026.
.
.
 Coll. No. 1741, Aliciella pinnatifida |
 Coll. No. 1903, Aliciella pinnatifida |
Ipomopsis aggregata (Pursh) V. E. Grant. (Syn: Gilia aggregata (Pursh) Sprengel ) Scarlet Gilia. CalPhotos. Jepson eFlora. SEINet Taxon.
- Dispersed Camp Site #8, 4594. 4/16/2026. . .
Ipomopsis aggregata (Pursh) V.E. Grant ssp. collina (Greene) Wilken & Allard. Scarlet Gilia. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, 50-60 cm.; Stem, glandular, few long white hairs; Leaves, basal and cauline similar, 37 mm. × 24 mm. wide, pinnatifid with narrow segments, reduced above; Inflorescence, narrow thyrse; Pedicels, 1-2.5 mm.; Calyx, tube 5 mm. + lobes 1.5 mm., glandular, hyaline sinuses, tips spinulose; Corolla, salverform, tube 25 mm. × 1.8 mm. gradually expanding to 5 mm. wide, + lobes 5 mm., spreading; Stamens, some barely exserted (Described from Coll. No. 2172, 23 Jul 2019).
- North Twin Creek, 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. 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. Tom Schweich 3442. 2 Jul 2025. ( CAS FLD ) .
- Dispersed Camp Site #2,
probably var. collina as that was collected (#3442) at North Twin Creek
3882.
9/12/2024.
.
 Coll. No. 2172, Ipomopsis aggregata ssp. collina |
Polygonaceae
Eriogonum alatum Torrey in L. Sitgreaves, Rep. Exped. Zuni Colorado Rivers. 168, plate 8. 1853. (Syn: Pterogonum alatum (Torr.) Gross ) Winged Buckwheat. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek,
4191.
6/18/2025.
.
Primulaceae
Androsace septentrionalis L. (Syn: Androsace septentrionalis L. ssp. subumbellata (A. Nelson) G. T. Robbins ) Pygmyflower Rockjasmine. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
bracts lanceolate
6186.
6/12/2026.
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.
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.
Tom Schweich 3461.1
21 Jul 2025.
(
FLD
)
.
.
 Coll. No. 1468, Androsace septentrionalis |
 Details of the umbel of Coll. No. 1907, Androsace septentrionalis |
Lysimachia ciliata L. Fringed Loosestrife. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 40 cm.; Leaves, cauline, opposite, petiole, 12 mm., sparsely long ciliate, blade, 72 mm. × 26 mm. wide, lanceolate, glabrous, margin minutely ciliate; Inflorescence, axillary, flowers borne singly on long pedicels; Pedicel, 30 mm.; Sepals, #5, 4 mm.; Petals, #5, 7 mm. × 6 mm. wide, free ≥½length, yellow; Stamens, #5, alternate; Filaments, 2 mm., attached near base; Anthers, 2 mm.; Ovary, superior; Style, #1, 3 mm., lengthening to 4 mm. at maturity; Fruit, 3 mm. × 3 mm. dia., globose, bluish. Described from Coll. No. 1723, 28 Jul 2018.
- North Twin Creek,
4277.
7/21/2025.
.
.
 Coll. No. 1723, Lysimachia ciliata |
Primula pauciflora (Greene) Mast & Reveal. Beautiful Shootingstar. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek, 6205. 6/26/2026. . .
Primula pauciflora (Durand) A. R. Mast & Reveal var. pauciflora. (Syn: Dodecatheon pulchellum (Raf.) Merr. ) Darkthroat Shooting Star. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
6184.
6/12/2026.
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.
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.
Tom Schweich 3432.
2 Jul 2025.
(
FLD
OBI
)
.
 Coll. No. 2287, Docecatheon pulchellum |
 Coll. No. 2927, Dodecatheon pulchellum in Magpie Gulch. |
 Coll. No. 2459, Dodecatheon pulchellum |
 Coll. No. 2927, Dodecatheon pulchellum |
Ranunculaceae
Anemonastrum canadense (L.) Mosyakin. (Syn: Anemone canadensis L. ) Candian Anemone. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 6185. 6/12/2026. with Rosa acicularis sayi Tom Schweich 3600. 12 Jun 2026. ( Undist. ) .
- Twin Creek,
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.
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.
Tom Schweich 3405.1
18 Jun 2025.
(
KHD
OBI
)
.
.
 Coll. No. 3505.1, Anemonastrum canadense. |
Pulsatilla nuttalliana (DC.) Bercht. & J. Presl. (Syn: Anemone nuttalliana DC. , Anemone patens L. var. nuttalliana (DC.) A Gray , P. patens (L.) Mill ssp. nuttalliana (DC.) ined. ) Pasque Flower. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Dispersed Camp Site #8,
4585.
4/16/2026.
Occasional, only one collected, with Artemisia frigida and unidentifiable grasses.
This area burned by Hayman Fire (2002), mapped as high intensity, no tree seedlings seen in immediate vicinity.
Flat between Dispersed Camp #8 and a point of rocks 700 m. to the south southeast, 9.4 road miles generally southwest of Deckers by way of County Road 126 and Pike-San Isabel Forest Road 211.
Tom Schweich 3560.
16 Apr 2026.
(
CS
)
.
.
 Pulsatilla nuttalliana under Ponderosa pines. |
 Coll. No. 1075, Pulsatilla nuttalliana |
 Coll. No. 1793, Pulsatilla nuttalliana |
Ranunculus L. Buttercup. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, Tom Schweich 3579. 15 May 2026. ( Undist. ) Tom Schweich 3580. 15 May 2026. ( Undist. ) . .
Thalictrum fendleri Engelm. ex A. Gray. Fendler's Meadow Rue. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, semi-open forest floor, with Erysimum capitatum. Tom Schweich 3599. 12 Jun 2026. ( Undist. ) .
- Twin Creek,
4177.
6/18/2025.
6212.
6/26/2026.
.
 Coll. No. 2528, Thalictrum fendleri |
 Coll. No. 3292, Thalictrum fendleri in fruit. |
 Coll. No. 3292, Thalictrum fendleri. |
Rhamnaceae
Ceanothus fendleri A. Gray. Fendler's Ceanothus. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 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. 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. Tom Schweich 3500. 18 Aug 2025. ( OBI ) Tom Schweich 3611. 12 Jun 2026. ( Undist. ) .
- Twin Creek,
4193.
6/18/2025.
.
 Coll. No. 1700, Ceanothus fendleri |
 Fruit of Coll. No. 2183, Ceanothus fendleri |
Rosaceae
Cercocarpus montanus Raf. Alder-Leaf Mountain Mahogany. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Described by Rafinesque from a specimen collected by Edwin James of the Long Expedition, 1820, probably in present Jefferson County, Colorado. Rafinesque was somewhat frustrated by Torrey's reluctance publish a new species name in assigning James' collection to C. fothergillides Humb. Bonpl. And Kunth.
- North Twin Creek, 4368. 8/18/2025. 4376. 8/18/2025. 6072. 5/15/2026. .
- Dispersed Camp Site #2, 3883. 9/12/2024. .
- Twin Creek,
4187.
6/18/2025.
.
.
Dasiphora fruticosa (L.) Rydb. (Syn: Potentilla fruticosa L. ) Shrubby Cinquefoil, Golden Hardtack. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
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.
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.
Tom Schweich 3438.
2 Jul 2025.
(
CAS
UCR
)
.
.
 Blue Copper on Coll. No. 2898, Dasiophora fruticosa. |
 Small wetland around creek below burned slopes. |
 Coll. No. 2592, Dasiphora fruticosa |
 Coll. No. 2898, Dasiophora fruticosa. |
Drymocallis fissa (Nutt.) Rydb. (Syn: Potentilla fissa Nutt. ex Torr. & A.Gray ) CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial, herb, caespitose, to 20 cm., terrestrial, not stoloniferous, rhizomatous, glandular-hairy throughout; Stem, erect, green, multicellular viscid hairs; Leaves, basal, 58-125 mm. × 16-26 cm. wide, pinnately compound, leaflets, #11; cauline, #3-4 per stem, alternate, stipules, 5 mm. × 2 mm. wide, lanceolate, entire to once shallowly toothed; petiole, 18 mm., prior years remaining on plant (as sometimes described for P. rupincola), multicellular viscid hairs, leaflets, #7-13, 40-51 mm. × 20-22 mm. wide, petiolulate (not decurrent), 12 mm. × 9 mm. wide, viscid hairy, terminal leaflet (8)10 mm. side, margin, flat, serrate, teeth, 4-6 per side, on distal ¾, tip dark reddish; Inflorescence, congested cyme, with 5-7 flowers; Flowers, limb, 15 mm.; Calyx, lobes, #5, 7-11 mm. × 2.7-4.5 mm. wide, fused ±½, viscid hairy, epicalyx bractlets, 3-5 mm. × 0.8-1.3 mm. wide, ±½ sepals; Receptacle, hairy, <1 mm., Petals, 7-9 mm. × 5-9 mm. wide, obovate, color yellow; Stamens, >25; Anthers, 1.4 mm. × 1 mm. wide; Ovaries, many, superior, glabrous; Styles, widest at middle, or thickest at base, tapered from middle, attached laterally below top of ovary; Stigma, #1; Achenes, glabrous. (Described from Coll. No. 1364, 21 May 2016, and Coll. No. 1911, 31 May 2018).
- North Twin Creek, 6075. 5/15/2026. with Coll.No. 3572, Packera fendleri. Tom Schweich 3573. 15 May 2026. ( Undist. ) .
- Twin Creek,
4186.
6/18/2025.
4190.
6/18/2025.
.
.
 Coll. No. 1099, Drymocallis fissa |
 Coll. No. 1099, Drymocallis fissa |
 Coll. No. 1911, Drymocallis fissa |
Fragaria L. Strawberry. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, Tom Schweich 3582. 15 May 2026. ( Undist. ) . .
Geum macrophyllum Willd. Large-leaf Avens. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 50 cm., plant drying green; Leaves, upper stem leaves divided near to base; Sepals 5; Hypanthium bractlets (not visible); Petals 5 (not visible); Style continuous to fruit, 3 mm., hooked, not plumose, without bristles, non-glandular; Fruit, many per flower, 2.5 mm (Described from Coll. No. 438.1, 12 Nov 2012, var. perincisum considered indistinct).
- Tarryall Mountains, East Slope,
Growing along a small creek in a cool damp grotto.
Pike National Forest. Side drainage of Goose Creek 1 mile west of Hankens Gulch.
Mark Duff 129.
14 Aug 1992.
(
COLO689679‡
)
.
.
 Geum macrophyllum growing beside a spring. |
 Overview of Collection No. 560 |
 Detail of Coll. No. 685, Geum macrophyllum |
Geum macrophyllum Willd. var. perincisum (Rydb.) Raup. Large-leaf Avens. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, streamside, in willow and aspen, with Dasophora fruticosa Tom Schweich 3601. 12 Jun 2026. ( Undist. ) .
- Twin Creek,
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.
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.
Tom Schweich 3402.
18 Jun 2025.
(
EIU
FLD
KHD
REGIS
)
.
.
 Coll. No. 2893, Geum macrophyllum var. perincisum |
 Coll. No. 3402, Geum macrophyllum ver. perincisum. |
 Coll. No. 438.1, Geum macrophyllum var. perincisum |
Holodiscus discolor (Pursh) Maxim. var. microphyllus (Rydb.) Jeps. (Syn: H. microphyllus Rydb. , H. microphyllus Rydb. var. microphyllus ) Ocean Spray. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial shrub, to 2 m.; Leaves, alternate and alternate clusters, 12 mm. × 11 mm. wide, base wedge-shaped, widest at or below middle, toothed distally, teeth entire, veins pinnate, glands 0; Inflorescence, raceme; Pedicels, 4.5 mm., bractlets, #2; Petals, white; Ovary, superior; Pistils, #5, hairs dense bristle-like. Described from Coll. No. 1189, 26 June 2015. Treated as H. microphyllus Rydb. Var. microphyllus by FNANM.
- North Twin Creek, fide Coll. No. 3470. 4381. 8/18/2025. 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). 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. Tom Schweich 3470. 21 Jul 2025. ( CAS KHD OBI UCR ) .
- Twin Creek,
6213.
6/26/2026.
.
.
Physocarpus monogynus (Torr.) J.M. Coult. (Syn: Spiraea monogyna Torr. ) Mountain Ninebark. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Shrub, height unknown (growing in ravine); Leaves, alternate, simple, hairs stellate, petiole, 10 mm., blade, 30 mm. × 33 mm. wide, ovate, palmate-veined, doubly crenate; Inflorescence, umbellate corymb, ±20-flowered; Pedicels, 8-12 mm.; Flowers, limb, 12 mm., petals, 4.5 mm., color cream; Styles, 2 (Described from Coll. No. 1397, 8 June 2016).
- Twin Creek,
4183.
6/18/2025.
.
.
Potentilla L. Cinquefoil. CalPhotos. Jepson eFlora. SEINet Taxon.
- Dispersed Camp Site #2,
Lvs. pinnate, adaxial gray.
3888.
9/12/2024.
.
.
 Accidental Coll. No. 1473.1, Potentilla sp. |
Potentilla hippiana Lehm. var. hippiana. Wooly Cinquefoil. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial herb, to 35 cm., woody caudex; Stem, unbranched, pilose; Leaves, basal and cauline, basal, 70 mm. × 24 mm. wide, pinnately compound, sericeous adaxially, tomentose and sericeous abaxially, distinctly bicolored or not, leaflets, #9, toothed along full length, cauline, reduced, stipules, 11 mm. × 3 mm. wide, lanceolate, entire, leaflets, #5, 24 mm. × 6 mm. wide, without decurrent bases, toothed along length; Inflorescence, cyme; Bractlets, ±same color as sepals; Petals, 5 mm. × 4.5 mm. wide, yellow; Styles, 2.7 mm., tapered from base, smooth (Described from Coll. No. 2182, 2902).
- North Twin Creek, 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. 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. Tom Schweich 3440. 2 Jul 2025. ( FLD ) .
- Twin Creek,
4188.
6/18/2025.
.
.
 Coll. No. 2646, Potentilla hippiana var. hippiana. |
Prunus virginiana L. Chokecherry. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
The most useful distinction is between chokecherries found east of the Rocky Mountains, var. virginiana and those found from the mountains westward, var. demissa. Plants of the High Plains show intergradation between those of the Rockies and those of the East.
- Twin Creek,
4178.
6/18/2025.
.
.
Rosa acicularis Lindl. ssp. sayi (Schwein.) W. H. Lewis. (Syn: Rosa acicularis Lindl. , Rosa sayi Schweinitz ) Say's Acicular Rose. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Prickles on new growth, leaflets 5-7(9), flowers 1-3
- North Twin Creek,
The roses here have few narrow prickles on new growth, and 7 (9) leaflets, but they are not in bloom. They are probably R. acicularis var. sayi.
4221.
7/2/2025.
.
.
 Rosa acicularis ssp. sayi on North Table Mountain. |
 Coll. No. 3027, Rosa acicularis ssp. sayi. |
 Coll. No. 3398, Rosa acicularis ssp. sayi. |
 Coll. No. 2545, Rosa acicularis var. sayi |
Rosa arkansana Porter. Prairie Rose. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Low-growing perennial, to 20 cm.; Stem, straight slender unequal prickles, present on new growth; Leaves, alternate, compound, leaflets (7)9-11, 20 mm. × 9 mm. wide, serrate, teeth dark-tipped, unclear whether there is glandular exudate, sparsely villous on both sides; Flowers, in clusters of 2-5; Sepals, 16 mm. × 3 mm. wide, abaxial, stalked glandular, adaxial, glandular hairy; Petals, 28 mm. × 21 mm. wide, color pink (Described from Coll. No. 1456, 27 June 2016).
- Twin Creek,
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.
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.
Tom Schweich 3410.
18 Jun 2025.
(
OBI
UCR
)
.
.
 Coll. No. 3410, Rosa arkansana. |
 Coll. No. 3410, Rosa arkansana. |
 Coll. No. 1456, Rosa arkansana |
 Coll. No. 1670, Rosa arkansana |
 New growth of Coll. No. 1670, Rosa arkansana |
Rubus deliciosus Torr. (Syn: Oreobatus deliciosus Torr.(E. James ex Torr.) Rydb. ) Delicious raspberry. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial shrub, to 1.5 m.; Stem, bark, shreddy; Leaves, simple, 17 mm. × 23 mm. wide, palmate veined, lobed, serrate, few straight hairs, petiole, 11 mm.; Flowers, white, solitary, 17-19 mm.; Fruit, unknown (Described from Coll. No. 1091, 30 Apr 2015).
- North Twin Creek,
4375.
8/18/2025.
.
.
Coll. No. 1091, Rubus deliciosus |
 Coll. No. 1091, Rubus deliciosus |
 Coll. No. 1091, Rubus deliciosus |
Rubus idaeus L. var. strigosus (Michx.) Maxim. American Red Raspberry. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, var. strigosus fide Coll. No. 3464 4220. 7/2/2025. 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). 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. Tom Schweich 3464. 21 Jul 2025. ( KHD OBI UCR ) .
- Twin Creek,
var. strigosus fide Coll. No. 3464
4182.
6/18/2025.
.
 Coll. No. 2506, Rubus idaeus var. strigosus |
Rubiaceae
Galium boreale L. (Syn: Galium septentrionale Roem. & Schult. ) Bedstraw. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial, to 40 cm.; Stems, ascending; Leaves, in whorls of 4, tips rounded, 3-nerved; Flowers, cream-colored; Fruit, short-hairy (Described from Coll. No. 2374, 23 June 2020).
- Twin Creek,
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.
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.
Tom Schweich 3408.
18 Jun 2025.
(
CAS
FLD
)
.
.
 Habitat of Coll. No. 3266, Galium boreale in Coal Creek Canyon. |
 Coll. No 1721.1, Galium boreale |
 Mature Inflorescence of Coll. No 1721.1, Galium boreale |
Galium triflorum Michx. Fragrant Bedstraw. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek,
cascade
Tom Schweich, with Matt Schweich 3619.
26 Jun 2026.
(
Undist.
)
.
 Coll. No. 3085, Galium triflorum. |
Salicaceae
Populus tremuloides Michx. Quaking Aspen. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Dispersed Camp Site #8,
4590.
4/16/2026.
.
 Coll. No. 924, Populus tremuloides |
 Bud of Coll. No. 944, Populus tremuloides |
 Male catkin of Coll. No. 944, Populus tremuloides |
Sapindaceae
Acer glabrum Torr. var. glabrum. (Syn: A. glabrum Torr. var. torreyi (Greene) Smiley ) Rocky Mountain Maple. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek,
4185.
6/18/2025.
.
Saxifragaceae
Heuchera hallii A. Gray. Front Range Alumroot. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, joints in granite outcrops 4372. 8/18/2025. .
- Twin Creek,
6209.
6/26/2026.
.
.
 Heuchera hallii observed beside the Little Scraggy Trail. |
 Obs. No. 3756, Heuchera hallii. |
Heuchera parvifolia Nutt. ex Torr. & A. Gray. Littleleaf Alumroot. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Inflorescence, (not secund)
- North Twin Creek,
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.
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.
Tom Schweich 3419.
18 Jun 2025.
(
CAS
COLO
)
.
.
 Coll. No. 1655, Heuchera parvifolia |
 Coll. No. 2928, Heuchera parvifolia. |
 Coll. No. 3274, Heuchera parvifolia. |
Saxifraga bronchialis L. var. austromontana (Wiegand) Piper. Spotted Saxifrage. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, side of disintegrating outcrop of Pikes Peak granite Tom Schweich 3608. 12 Jun 2026. ( Undist. ) .
Scrophulariaceae
Verbascum thapsus L. Common Mullein. Weed: CO DofA, List: C. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
4219.
7/2/2025.
4228.
7/2/2025.
4371.
8/18/2025.
4384.
8/18/2025.
4385.
8/18/2025.
.
 Package of Mullein in the Pharmacy at Fort Hartsuff. |
 Dense colonies of Common Mullein (Verbascum thapsus) in Cottonwood Canyon |
 Collection No. 512, Verbascum thapsus |
Undet.
Undetermined . CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
Tom Schweich 3583.
15 May 2026.
(
Undist.
)
.
 Accidental Coll. No. 1240.1, Undetermined |
 Coll. No. 1248, Undetermined |
Urticaceae
Urtica . CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek, 6203. 6/26/2026. .
Violaceae
Viola nephrophylla Greene. (Syn: Viola sororia Willd. ssp. affinis (Le Conte) R. J. Little ) Northern Bog Violet. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
Northern tributary to North Twin Creek, 1.16 km. upstream of the crossing of North Twin Creek by Forest Road 211, 6.8 mi. west and south on F. R. 211 from its north end at County Road 126, 11.5 km. southwest of Deckers.
Tom Schweich 3578.
15 May 2026.
(
KHD
)
.
 Coll. No. 3578, Viola nephrophylla. |
Amaryllidaceae
Allium cernuum Roth. Nodding Onion. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 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. 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. Tom Schweich 3459. 21 Jul 2025. ( COLO EIU FLD ) .
- Dispersed Camp Site #2,
3895.
9/12/2024.
.
 Habitat of Coll. No. 1240, Allium cernuum |
 Coll. No. 1240, Allium cernuum |
 Coll. No. 3189, Allium cernuum. |
Asparagaceae
Leucocrinum montanum Nutt. ex A. Gray. Star Lily. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Dispersed Camp Site #8,
Soil of coarse decomposed granite, with Achillea millefolium, Artemisia frigida, Packera fendleri, Ceanothus fendleri, and miscellaneous unidentifiable grasses.
This area burned by Hayman Fire (2002), mapped as high intensity here. Only a few Populus tremuloides re-established in immediate vicinity.
Flat between Dispersed Camp #8 and a point of rocks 700 m. to the south southeast, 9.4 road miles generally southwest of Deckers by way of County Road 126 and Pike-San Isabel Forest Road 211.
Tom Schweich 3563.
16 Apr 2026.
(
FLD
)
.
Cyperaceae
Carex L. Sedge. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
Tom Schweich 3584.
15 May 2026.
(
Undist.
)
Tom Schweich 3585.
15 May 2026.
(
Undist.
)
.
.
 Inforescence of Coll. No. 3293, Carex sp. |
Carex inops L. H. Bailey ssp. heliophila (Mack.) Crins. (Syn: C. pensylvanica Lam. ssp. heliophila (Mack.) W. A. Weber ) Sun Sedge. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial herb, to 16 cm., prior year leaves to 23 cm.; Rhizome, 5-10(12) cm.; Culm, 11.5 cm. × 0.6 mm., ±triangular, but obscured by white striations at least when dry; Leaves, 12 cm. × 1.5 mm., ±flat, some folded ≤30°.; Inflorescence, multiple spikes, all approximate, 1-2 pistillate spike(s) below, 1 staminate spike above; Bracts, lowest, blade 8 mm., sheath 4.5 mm., papery; Pistillate spike, peduncled 1.0-1.3 mm., 9 mm., brown (not black); Staminate spike, terminal, 12-16 mm., ovoid (not cylindric), brown (not black); Scales, >perigynum body; Perigynum, pubescent on faces, margin ciliate; Achenes, unknown. Described from Coll. No. 1079, 23 April 2015, and Coll. No. 1568, 3 Apr 2017.
- Twin Creek,
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.
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.
Tom Schweich 3407.
18 Jun 2025.
(
FLD
KHD
)
.
.
Carex interior L. H. Bailey. Inland Sedge. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
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.
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.
Tom Schweich 3439.2
2 Jul 2025.
(
KHD
)
.
.
 Coll. No. 3439.2, Carex interior. |
 Inflorescence of Coll. No. 3439.2, Carex interior. |
Carex leptalea Wahlenberg. Bristly-stalked Sedge. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
6190.
6/12/2026.
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.
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.
Tom Schweich 3439.3
2 Jul 2025.
(
KHD
)
About 28 m. downstream from Coll. No. 3439.3, 2 July 2025, KHD85968; also seen on the main branch of North Twin Creek.
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.
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.
Tom Schweich 3602.
12 Jun 2026.
(
Undist.
)
.
.
Carex occidentalis L. H. Bailey. Western Sedge. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial sedge; Habit, caespitose; Culms, to 50 cm., slightly scabrous especially below the inflorescence; Leaves, 1.7 mm. wide, green, sheaths, white-hyaline, ventrally smooth; Inflorescence, 29 mm. × 10 mm. wide, loosely clustered; Spikes, identical appearing, 6 mm. × 5 mm. wide, terminal and lateral androgynous (there are no anthers, but the flowers at the top of each spike contain white filaments); Bracts, 5 mm., proximal, 10 mm., <inflorescence, leaf-like; Pistillate scales, 3.5 mm., <perigynia, mid-vein green, brown laterally, hyaline margin; Perigynia, #12 per spike, 4 mm. × 1.6-1.8(2) mm. wide, weakly winged, ±veinless, glabrous, beak, 1 mm., flattish, dorsally bulged and the margin is displaced but not onto the ventral face; Achene, 2.3 mm. × 1.5 mm. wide, biconvex, short oblong; Stigmas, #2; Anthers, n/a; (Described from Coll. No. 2056, 4 Jun 2019, but see also Coll. No. 1913 & 3567.)
- Twin Creek,
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.
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.
Tom Schweich 3407.1
18 Jun 2025.
(
KHD
)
.
.
Carex stipata Muhl. ex Willd. Saw Beaked Sedge. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
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.
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.
Tom Schweich 3439.
2 Jul 2025.
(
KHD
OBI
)
.
 Coll. No. 3293, Carex stipata. |
Iridaceae
Sisyrinchium montanum Greene. Rocky Mountain Blue-Eyed Grass. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Tarryall Mountains, East Slope, Sunny area near stream. Lost Creek Area, Tarryall Mtns., 80km (50mi) southwest of Denver and 80km northwest of Colo. Springs. Near Goose Creek trailhead. P. Murphy 79145. 9 July 1979. ( COLO415000‡ ) .
- Twin Creek,
late in seed.
4390.
9/3/2025.
.
 Inflorescence of Coll. No. 2071, Sisyrinchium montanum |
Juncaceae
Juncus L. Rush. CalPhotos. Jepson eFlora. SEINet Taxon.
- Twin Creek,
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.
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.
Tom Schweich 3407.2
18 Jun 2025.
.
.
 Coll. No. 1274, Juncus |
Juncus ensifolius Wikstr. Sword-Leaf Rush. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, 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. 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. Tom Schweich 3439.1 2 Jul 2025. ( CAS ) .
- Twin Creek,
6207.
6/26/2026.
.
 Coll. No. 2655, Juncus ensifolius |
 Gall(?) on Coll. No. 2655, Juncus ensifolius |
 Coll. No. 3439.1, Juncus ensifolius. |
Melanthiaceae
Anticlea elegans (Pursh) Rydb. (Syn: Zigadenus elegans Pursh ) Mountain Death Camas. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
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.
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.
Tom Schweich 3468.
21 Jul 2025.
(
CAS
OBI
UCR
)
.
 Coll. No. 3338, Anticlea elegans. |
Orchidaceae
Corallorhiza maculata (Raf.) Raf. Summer Coralroot. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek,
determination tentative
4224.
7/2/2025.
streamside, deep layers of cone scales, Pinus scopulorum, Pseudotsuga menziesii, Cymopterus lemmonii, Thalictrum fendleri, Rosa sp., Populus tremuloides, Maianthemum racemosum
Tom Schweich 3598.
12 Jun 2026.
(
Undist.
)
.
.
 Observation No. 3687, Orchidaceae Corallorhiza maculata. |
Platanthera aquilonis Sheviak. Northern Green Orchid. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
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.
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.
Tom Schweich 3437.
2 Jul 2025.
(
OBI
)
.
 Coll. No. 3437, Platanthera? |
 Coll. No. 2892, Platanthera aquilonis. |
 Coll. No. 3437, Platanthera aquilonis. |
 Flower of Coll. No. 2892, Platanthera aquilonis. |
Poaceae
. Grass Family. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek,
banks of streamside- openings in river birch
Tom Schweich 3605.
12 Jun 2026.
(
Undist.
)
Tom Schweich 3610.
12 Jun 2026.
(
Undist.
)
.
.
 Coll. No. 3036, unknown grass. |
Bouteloua gracilis (Kunth) Lag. ex Griffiths. (Syn: Chondrosum gracile Kunth ) Blue Grama. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- North Twin Creek, 4378. 8/18/2025. 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. 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. Tom Schweich 3498. 18 Aug 2025. ( CAS ) .
- Dispersed Camp Site #2,
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.
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.
Tom Schweich 3377.
12 Sep 2024.
(
FLD
KHD83421‡
OBI
UCR248674‡
)
.
.
Bouteloua simplex Lag. Matted Grama. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Dispersed Camp Site #2,
Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, and Eriocoma robusta.
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.
Tom Schweich 3380.
12 Sep 2024.
(
KHD
)
.
.
 Distribution of collections of Bouteloua simplex in Colorado. |
 Coll. No. 3380, Bouteloua simplex. |
Bromus L. Brome. CalPhotos. Jepson eFlora. SEINet Taxon.
- North Twin Creek, Artemisia frigida, Arctostaphylos uva-ursi, Verbascum thapsus, Drymocallis fissa Ridge between North Twin Creek and its northern tributary Tom Schweich 3604. 12 Jun 2026. ( Undist. ) . .
Bromus japonicus Thunb. Japanese Cheat Grass. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Coll. No. 1207, 13 Jul 2015, characters observed: Annual grass, to 40 cm.; Leaves, sheath, 60 mm. closed + 12 mm. open, pilose (but not densely so), ligule, membraneous, + some hairs, blade, hairy; Inflorescence, panicle, >leaves; Pedicel, 20 mm.; Spikelets, 1-3 per panicle branch, 22 mm. × 6 mm. wide, elliptical, drooping; Glumes, #2, <lowest floret, lower, 4.5 mm., veins 3, upper, 5.5 mm., veins 5; Rachilla, short hairy; Callus, glabrous; Florets, #12, 2-ranked, closely held hiding rachilla; Disarticulation between florets; Lemma, 8 mm. × 4 mm. wide, margin, hyaline, 0.5 mm., tip bifid, awn, #1, 5-12 mm. long, mid-spikelet awns longest, flattened at base, not twisted, attached near bifid tip. Described from Coll. No. 1207, 13 Jul 2015.
- Twin Creek,
6225.
6/26/2026.
.
.
 Coll. No. 1207, Bromus japonicus |
 Coll. No. 1461, Bromus japonicus |
 Coll. No. 1207, Bromus japonicus |
 Coll. No. 1207, Bromus japonicus |
Bromus porteri (J.M. Coult.) Nash. Nodding Brome. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial grass, 45 cm., caespitose; Leaves, sheath, 130 mm., open about ½-way; collar minutely hairy, ligule, 2 mm., blade, 130 mm. × 4 mm. wide, flat, scabrous; Inflorescence, nodding, 1 per culm, panicle; Rachis, ascending hairy, not quite appressed; Spikelets, many, 23 mm. × 2.8 mm. wide, similar, pedicels, 44 mm.; Compression, unremarkable; Glumes, soft spreading hairy, lower, 7.5 mm., veins, 3, upper 8.5 mm., < lowest floret, veins, 3, converging, awns, 0, but mid-vein goes strongly right to the tip; Florets, 8 per spikelet; Callus, few short hairs; Lemma, 10.5 mm., > glumes, rolled, hairy. veins, 5, convergent, awns, 1, 1 mm., subterminal, straight; Palea, 9.5 mm., < lemma, membranous, ciliate, tip rounded; Stamens, 3; Anthers, 2.2 mm. (Described from Coll. No. 2860, 18 July 2022.)
- North Twin Creek,
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.
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.
Tom Schweich 3467.
21 Jul 2025.
(
CAS
EIU
KHD
REGIS
)
.
.
 Coll. No. 2860, Bromus porteri. |
Elymus elymoides (Raf.) Swezey. (Syn: E. longifolius (J. G. Sm.) Gould , Sitanion hystrix (Nutt.) J. G. Sm. ) Squirreltail Grass. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial grass to 50 cm., clumped; Inflorescence, bilateral spike; Rachis, internodes, 6.4 mm., breaking apart when mature; Spikelets, 2 per node; Glumes, #2, subulate, 62-65 mm.; Florets, #3, lowest 2 fertile, upper sterile; Lemma, 10 mm. + awn 50 mm., veins, #5, converging; Palea, 9 mm., 1 of 2 veins slightly extended as bristle. Variety brevifolius if infraspecific names are to be applied. Described from Coll. No. 1717, 28 July 2017.
- North Twin Creek,
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.
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.
Tom Schweich 3463.
21 Jul 2025.
(
CAS
FLD
REGIS
)
.
.
 Coll. No. 1717, Elymus elymoides |
Eriocoma robusta (Vasey) Romasch. (Syn: Achnatherum robustum (Vasey) Barkworth , Stipa robusta (Vasey) Scribn. ) Sleepygrass. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Dispersed Camp Site #2, Thin ponderosa pine forest with Erigeron divergens, Heterotheca villosa, Hymenothrix dissecta, Solidago missouriensis, Symphyotrichum porteri, Townsendia grandiflora, Castilleja integra, and Bouteloua simplex. 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. Tom Schweich 3379. 12 Sep 2024. ( KHD83420‡ OBI UCR309639‡ ) .
- Twin Creek,
Also here: Artemisia frigida, Senecio spartioides, Chenopodium leptophyllum, Euphorbia serpyllifolia, Cercocarpus montanus, Verbascum thapsus, and Bouteloua gracilis.
Along an old road into Twin Creek from F. R. 211, 11.8 km. southwest of Deckers.
Tom Schweich 3504.
3 Sep 2025.
(
CAS
COLO
FLD
REGIS
)
.
.
 Coll. No. 2683, |
 Coll. No. 1493, |
 Coll. No. 1740, |
Hesperostipa comata (Trin. & Rupr.) Barkworth. (Syn: Stipa comata Trin. & Rupr. ) Needle and Thread. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial, 50 cm., clumped, nonrhizomatous; Roots, fibrous; Stem, herbaceous; Leaves, blade and sheath differentiated; Sheath, 100-120 mm., open ≥½, glabrous; Ligule, membranous, length 3.7 mm., lacerate into 2 equal parts, auricles 0; Blade, 60 mm., involute, glabrous; Inflorescence, 1 per culm, >leaves, panicle, 200 mm. × 30 mm. wide; Rachis, not extended, somewhat scabrous throughout; Spikelets, many, similar, borne singly; Compression, unremarkable; Disarticulation, above the glumes; Glumes, lower, 23-34 mm., veins #3, upper, 23-29 mm., veins #5, awl-shaped, rounded, membranous, ±equal, tip, very narrow, not awned; Florets, 1 per spikelet; Callus, 4.5-50 mm., sharp, straight hairs 1.0-1.5 mm., color tan; Lemma, 9.5-10.0 mm., rolled, indurate, straight hairy 0.5 mm., color white-tan, veins #3(?), awns, #1, 125-160 mm., twisted and short straight hairy proximal 45 mm., bent, scabrous distally; Palea, 9 mm., ±lemma, few white hairs on mid-vein; Stamens, #3; Anthers, 6.5 mm. (Described from Coll. No. 1890, 28 May 2018).
- Twin Creek,
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.
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.
Tom Schweich 3409.
18 Jun 2025.
(
CAS
FLD
)
.
.
 Coll. No. 992, Stipa comata var. comata |
 Coll. No. 1929, Hesperostipa comata |
 Florets of Coll. No. 1890, Hesperostipa comata |
Koeleria macrantha (Ledeb.) Schult. Prairie Junegrass. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial bunch grass, to 45-55 cm., non-rhizomatous; Leaves, mostly basal or lowest cauline, cauline, sheath, 90 mm., open, ligule, <1-1.5 mm., membraneous, auricles, 0, blade, 40 mm., tip prow-shaped or merely constricted; Inflorescence, panicle, 60 mm. × 9 mm., shiny in anthesis due to exposure of translucent palae, short branches, branches short soft hairy; Spikelets, 5 mm., 1 per node on 1°-3° or indistinct panicle branches; Glumes, lower, 3 mm., veins 1, upper, 4 mm., veins 3; Florets, 3, #1 and #2 pistillate, #3 staminate, or variously mixed bisexual and pistillate, open, i.e., palea separated from lemma; Disarticulation, between florets; Rachilla hairy, extends nearly 1 mm. above upper floret (or not); extension undecorated; Lemma, 4.5 mm., veins 5, short hairy throughout, awn, 0-0.5 mm., short, soft; Palea, =lemma, translucent or colorless, exposed, i.e., outside lemma.; Stamens, 3, 1.8 mm. Described from Coll. No. 1131, 9 June 2015, and Coll. No. 1144, 15 Jun 2015.
- North Twin Creek,
Open forest with Pinus ponderosa, Pseudotsuga douglasii, Antennaria sp., Artemisia frigida, and Arctostaphylos uva-ursi
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.
Tom Schweich 3458.
21 Jul 2025.
(
CAS
CS
FLD
)
.
.
 Coll. No. 1131, Koeleria macrantha |
 Coll. No. 1117, Koeleria macrantha |
 Coll. No. 1131, Koeleria macrantha |
 Inflorescence of Coll. No. 1419, Koeleria macrantha |
Muhlenbergia montana (Nutt.) Hitchc. Mountain Muhly. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial grass, to 50 cm., caespitose; Leaves, sheath, open, ligule, membraneous, 4.5 mm., auricles, 0, blade, 110 mm. × 1 mm. wide; Inflorescence, rather sparse contracted panicle, 120 mm.; Florets per spikelet, #1; Glumes, #2, papery, toothed, lower, 1.5 mm., upper, 2 mm., teeth 3; Lemma, 3 mm. + awn 13 mm., flexuous, tuft of hairs at base; Palea, 2.8 mm. Described from Coll. No. 1282, 28 Aug 2015.
- North Twin Creek, 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. 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. Tom Schweich 3492. 18 Aug 2025. ( UCR ) .
- Dispersed Camp Site #2,
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.
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.
Tom Schweich 3373.
12 Sep 2024.
(
KHD
x-CDA
)
.
.
 Coll. No. 1282, Muhlenbergia montana |
 Inflorescence of Coll. No. 1282, Muhlenbergia montana |
Muhlenbergia wrightii Vasey ex J.M. Coult. Spike Muhly. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial grass, to 60 cm., caespitose; Culms, erect, not rooting at nodes, short hairy; Leaves, sheath, open, 12 cm., ligule, membraneous, 1 mm., auricles 0, blade, 12 cm. × 1.5 mm., folded; Inflorescence, narrow (4 mm.) spike-like panicle; Spikelets, neither enclosed in burs nor in pairs; Florets, 1 per spikelet, reduced florets absent; Glumes, ±equal, 1.5 mm. + awn 0.5 mm.; Disarticulation, above the glumes; Lemma, 2 mm. × 0.5 mm. wide + awn 0.5 mm. (usually described as “mucronate” rather than awned); Palea, ?. Described from Coll. No. 1276, 30 Jul 2015.
- Twin Creek,
Small terrace beside Twin Creek. With Symphyotrichum foliaceum var. parryi and Bouteloua gracilis
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.
Tom Schweich 3509.
3 Sep 2025.
(
CAS
FLD
REGIS
UCR
)
.
.
Nassella viridula (Trin.) Barkworth. (Syn: Stipa viridula Trin. ) Green Needlegrass. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial grass, 70-100 cm., clumped, non-rhizomatous; Stem, herbaceous; Leaves, cauline, sheath, 17 mm., ligule, 3 mm., membraneous, collar with few hairs at sides, blade, to 30 cm., convolute; Inflorescence, 1 per culm, panicle, 20-25 cm.; Rachis, lightly scabrous, not extended beyond upper spikelet; Compression, unremarkable; Spikelets, 1 per node; Florets, 1 per spikelet, bisexual; Glumes, 2, 8-9 mm., ±equal, rounded, membraneous, colorless, exc. 3 green veins, tip, short (2 mm.) hair-like awn; Disarticulation, above the glumes, Florets, 1 per spikelet; Callus, short; Lemma, 5-6 mm. × 1.2 mm. wide, <glumes, green, hairy, <1 mm., indurate, enclosing grain, awns, #1, 20-25 mm., twisted, bent, short hairy (±0.2 mm.); Palea, 1.5-2.0 mm., <lemma, membraneous, glabrous; Stamens, #3. Described from Colls. No. 1146, 1652, and 1698.
- North Twin Creek,
4222.
7/2/2025.
.
.
 Inflorescence of Coll. No. 1146, Nassella viridula |
 Inflorescence of Coll. No. 1146, Nassella viridula |
 Inflorescence of Coll. No. 1652, Nassella viridula |
Phleum pratense L. Timothy. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Twin Creek,
6230.
6/26/2026.
.
.
 Collection No. 501 |
 Coll. No. 1216, Phleum pratense |
 So, are there short awns? And what's with the truncate(?) glumes? |
 Collection No. 501, Phleum pratense L. Timothy. |
Poa fendleriana (Steud.) Vasey ssp. fendleriana. Muttongrass. CalPhotos. Jepson eFlora. SEINet Taxon.
Perennial grass, of shady dry places, to 40 cm., not rhizomatous; Leaves, sheath, open ½, ligule, membraneous, ±1 mm., auricles 0, blade, soft, short and rolled distally; Inflorescence, panicle, 3°-4° branches, somewhat contracted, i.e., not broad, branches sparsely scabrous; Pedicels, 1.5-2.5 mm., short ascending hairs; Spikelets, 1 per node; Compression lateral; Glumes, 2, lower, 3 mm., <lowest lemma, upper, 4 mm., Florets, 5-6, lowest 1-3 pistillate, upper undetermined but no evidence of stamens; Callus glabrous; Rachilla, extends beyond upper floret; Lemma, 4 mm., keeled, veins 5, tip obtuse, awns 0, wavy hairs proximal half of keels and margins; Palea, 2.3 mm., transparent, keels green and hairy. Described from Coll. No. 1126, 1 June 2015.
- Dispersed Camp Site #8,
With Artemisia frigida and Bouteloua gracilis.
This area burned by Hayman Fire (2002), mapped as low intensity here, no tree seedlings seen in immediate vicinity.
Flat between Dispersed Camp #8 and a point of rocks 700 m. to the south southeast, 9.4 road miles generally southwest of Deckers by way of County Road 126 and Pike-San Isabel Forest Road 211.
Tom Schweich 3561.
16 Apr 2026.
(
EIU
FLD
REGIS
)
.
.
 Coll. No. 1126, Poa fendleriana |
 Coll. No. 1126, Poa fendleriana ssp. fendleriana |
 Coll. No. 1126, Poa fendleriana ssp. fendleriana |
 Coll. No. 3561, Poa fendleriana var. fendleriana. |
Pseudoroegneria spicata (Pursh) A. Löve. (Syn: Elymus spicatus (Pursh) Gould ) Bluebunch Wheat Grass. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
Perennial grass, to 40 cm., rhizomatous, glabrous throughout; Inflorescence, 2-sided spike; Spikelets, 1 per node, flatside to rachis, sessile, overlap 28%; Disarticulation, above the glumes; Glumes, lanceolate, rolled, lower glume, 8 mm., veins 3 (not symmetric), short tip, upper glume, 9 mm., veins 4 (visible, not symmetric) awn 1 mm.; Lemma 10 mm., veins 5, awn 10 mm. divergent when dry; Palea, 9 mm. (Coll. No. 3458.1, 21 July 2025)
- North Twin Creek, Open forest with Pinus ponderosa, Pseudotsuga menziesii, Antennaria sp., Artemisia frigida, Arctostaphylos uva-ursi, and Koeleria macrantha. 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. Tom Schweich 3458.1 21 Jul 2025. ( KHD ) .
- Twin Creek,
6227.
6/26/2026.
.
.
 Coll. No. 3458.1, Pseudoroegneria spicata. |
Schizachyrium scoparium (Michx.) Nash. Little Bluestem. CalPhotos. Jepson eFlora. SEINet Taxon. Notes on Colorado Flora.
- Dispersed Camp Site #2, 3893. 9/12/2024. .
| Total number of taxa: | 173 |
| Native Taxa: (serif, italic, bold) | 149 |
| Exotic Taxa: (sans-serif, italic) | 9 |
| Nativity Undetermined: (default font, italic) | 15 |
| Listed Weeds: Identified as Weed | 5 |
Notes:
† -- Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
‡ -- Southwest Environmental Information Network, SEINet. 2009-2014. http//:swbiodiversity.org/seinet/index.php. Accessed from July 2009 to September 2014.
Locations Included in This Area
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Date and time this article was prepared: 8/1/2026 3:22:45 PM.
