Query: G.N.I.S.

See also: Clear Creek. Clear Creek Canyon Park. Welch Ditch.

I do not include this location in Golden s.l. because it extends quite some distance, i.e., some 22 km., west of Golden.

Elevation: 5695ft, 1736m.

Articles that refer to this location:

• Peaks to Plains Trail, Clear Creek and Jefferson Counties, Colorado: at suspension bridge; 
• Field Notes: August 10, 1881;  August 15, 1896;  August 22, 1896;  April 8, 1899;  November 8, 1902;  Wednesday, October 15th;  30 Oct 2014;  27 Apr 2018;  6 Jun 2021;  14 Sep 2021;  23 Sep 2021;  29 Mar 2024; 
• U. S. Highway 6: at Clr Ck Cyn;  at quarry; 

Literature Referring To This Location:

• Van Horn, Richard. 1972. Surficial and bedrock geologic map of the Golden Quadrangle, Jefferson County, Colorado. USGS IMAP: 761-A. 1972. {TAS-pdf} http://ngmdb.usgs.gov/ngm-bin/pdp/download.pl?q=7281_9511_5, accessed 27 August 2014

Northwest flank of Mount Zion above Clear Creek Canyon	View of Clear Creek upstream of the Welch Ditch Suspension Bridge.	View of Clear Creek downstream of the Welch Ditch Suspension Bridge.	Rock climbing class.	Rattlesnake in the Welch Ditch.
The east end of the Grant Terry Bridge.	Flat on the west side of the Grant Terry Bridge.	Head gate of the Church Ditch.	Welch Ditch suspension bridge.	Mouth of Clear Creek Canyon
Clear Creek Canyon as seen from Windy Saddle	Car wreck.

Species collected at or near this location.

This list summarizes plants collected or observed at this specific, named location. It does not include plants collected or observed at nearby named or unnamed locations. It may be more instructive to use the Area Lists that contain this location.

• TAS – The plant was collected by Tom Schweich.
• Oth – The plant was collected by someone, but not Tom.
• Obs – The plant was observed, but not collected.

Equisetaceae

Equisetum hyemale L. affine (Engelm.) Calder & Roy L.Taylor. Tall Scouring Rush (Obs) CC:4

Selaginellaceae

Selaginella mutica D.C. Eaton ex Underw. mutica. Bluntleaf Spikemoss (Oth) CC:7

Selaginella weatherbiana R. Tryon. Weatherby's Spike Moss (Oth) CC:7

Cupressaceae

Juniperus communis L. Common Juniper (Obs) CC:?

Juniperus scopulorum Sarg. Rocky Mountain Juniper (Obs) CC:5

Pinaceae

Pinus scopulorum Lemmon. Rocky Mountain yellow pine (Obs) CC:5

Pseudotsuga menziesii (Mirb.) Franco glauca (Beissn.) Franco. Douglas-fir (Obs) CC:5

Anacardiaceae

Rhus glabra L. Smooth Sumac (Obs) CC:6

Rhus trilobata Nutt. trilobata. Skunkbush Sumac (Obs) CC:5

Toxicodendron rydbergii (Small ex Rydb.) Greene. Western Poison Ivy (Obs) CC:3

Apiaceae

Selineae

Aletes acaulis (Torr.) J.M. Coult. & Rose. Stemless Indian Parsley (Oth) CC:7

Lomatium orientale J.M. Coult. & Rose. Salt-and-Pepper (Obs) CC:6

Smyrnieae

Conium maculatum L. Common Poison Hemlock (Obs) CC:0

Asteraceae

Anthemideae

Artemisiinae

Artemisia frigida Willd. Prairie Sagewort (Obs) CC:4

Artemisia ludoviciana Nutt. Silver Wormwood (Obs) CC:4

Matricariinae

Achillea millefolium L. Common Yarrow (Obs) CC:4

Astereae

Chrysopsidinae

Heterotheca villosa (Pursh) Shinners. Hairy False Goldenaster (Obs) CC:3

Pentachaetinae

Ericameria nauseosa (Pall. ex Pursh) G. I. Nesom & G. I. Baird. Rubber Rabbitbush (Oth) CC:?

Ericameria nauseosa (Pall. ex Pursh) G.L.Nesom & G.I.Baird graveolens (Nutt.) Reveal & Schuyler. Goldy-Locks (Obs) CC:3

Solidagininae

Solidago rigida L. humilis Porter. Stiff Goldenrod (Oth) CC:4

Symphyotrichinae

Symphyotrichum porteri (A. Gray) G.L. Nesom. Smooth White Aster (Obs) CC:6

Cardueae

Carduinae

Cirsium arvense (L.) Scop. Canada Thistle (Obs) CC:0

Cirsium undulatum (Nutt.) Spreng. Wavy Leaved Thistle (Obs) CC:5

Cichorieae

Crepidinae

Taraxacum officinale F. H. Wigg. Common Dandelion (Obs) CC:0

Lactucinae

Lactuca serriola L. Prickly Lettuce (Obs) CC:0

Scorzonerinae

Scorzonera laciniata L. Cutleaf Vipergrass (Oth) CC:0

Tragopogon dubius Scop. Yellow Salsify (Obs) CC:0

Eupatorieae

Brickellia californica (Torrey & A. Gray) A. Gray. California Brickelbush (Obs) CC:7

Liatris punctata Hook. Dotted Blazing Star (Obs) CC:6

Helenieae

Gaillardiinae

Gaillardia aristata Pursh. Blanketflower (Obs) CC:4

Perityleae

Pericome caudata A. Gray. Mountain Tail-Leaf (Obs) CC:6

Senecioneae

Senecio integerrimus Nutt. Columbia Ragwort (Obs) CC:5

Berberidaceae

Berberis repens Lindl. Creeping Barberry (Obs) CC:5

Betulaceae

Alnus incana (L.) Moench. Alder (Obs) CC:?

Betula occidentalis Hook. Water Birch (Obs) CC:8

Boraginaceae

Cynoglossum officinale L. Gypsyflower (Obs) CC:0

Ellisia nyctelea (L.) L. Aunt Lucy (Obs) CC:3

Hydrophyllum fendleri (A. Gray) A. Heller. Fendler's Waterleaf (Obs) CC:?

Mertensia lanceolata (Pursh) DC. Prairie Bluebells (Obs) CC:6

Oreocarya virgata (Porter) Greene. Miner"s Candle (Obs) CC:5

Phacelia heterophylla Pursh. Varileaf Phacelia (Obs) CC:6

Brassicaceae

Physaria vitulifera Rydb. Bull. Torrey Bot. Club 28: 278. 1901. Roundtip Twinpod (Oth) CC:6

Cactaceae

Opuntia macrorhiza Engelm. Western Pricklypear (Obs) CC:3

Opuntia polyacantha Haw. Plains Pricklypear (Obs) CC:5

Campanulaceae

Campanula petiolata A. DC. Western Harebell (Obs) CC:5

Campanula rotundifolia L. Harebell (Oth) CC:5

Cannabaceae

Humulus neomexicanus (A. Nelson & Cockerell) Rydb. New Mexican Hops (Obs) CC:5

Caryophyllaceae

Cerastium arvense L. strictum Gaudin. Field Chickweed (Obs) CC:5

Pseudostellaria jamesiana (Torr.) W. A. Weber & R. L. Hartm. Tuber Starwort (Obs) CC:6

Saponaria officinalis L. Bouncingbet (Obs) CC:0

Silene latifolia Poir. Bladder Campion (Obs) CC:0

Chenopodiaceae

Dysphania botrys (L.) Mosyakin & Clemants. Jerusalem Oak Goosefoot (Oth) CC:0

Salsola collina Pall. Slender Russian Thistle (Oth) CC:0

Cleomaceae

Polanisia dodecandra (Linnaeus) de Candolle trachysperma (Torrey & A. Gray) H. H. Iltis. Sandyseed Clammyweed (Oth) CC:1

Convolvulaceae

Convolvulus arvensis L. Field Bindweed (Obs) CC:0

Cornaceae

Cornus sericea L. Creek Dogwood (Obs) CC:7

Crassulaceae

Sedum lanceolatum Torr. Spearleaf Stonecrop (Obs) CC:5

Ericaceae

Pyrola asarifolia Michx. Liverleaf Wintergreen (Oth) CC:8

Euphorbiaceae

Euphorbia virgata Engelm. Leafy Spurge (Obs) CC:0

Fabaceae

Astragalus flexuosus G. Don. Flexible Milkvetch (Obs) CC:6

Astragalus parryi A. Gray. Parry's Milkvetch (Obs) CC:4

Colutea arborescens L. Bladder Senna (Obs) CC:0

Lupinus argenteus Pursh. Loosely Flowered Silver Lupine (Obs) CC:5

Lathyrus latifolius L. Perennial Pea Vine (Obs) CC:0

Medicago sativa L. Alfalfa (Obs) CC:0

Melilotus albus Medik. White Sweet Clover (Obs) CC:0

Oxytropis lambertii Pursh. Purple Locoweed (Obs) CC:5

Robinia pseudoacacia L. Black Locust (Obs) CC:0

Trifolium repens L. White Clover (Obs) CC:0

Thermopsis rhombifolia (Pursh) Richardson. Prairie Thermopsis (Obs) CC:5

Geraniaceae

Geranium caespitosum James. Pineywoods Geranium (Obs) CC:6

Grossulariaceae

Ribes aureum Pursh. Golden Currant (Obs) CC:6

Ribes cereum Douglas. Wax Currant (Obs) CC:6

Hydrangeaceae

Jamesia americana Torr. & A. Gray. Fivepetal Cliffbush (Obs) CC:?

Lamiaceae

Nepeta cataria L. Catnip (Obs) CC:0

Linaceae

Linum lewisii Pursh. Prairie Blue Flax (Obs) CC:4

Loasaceae

Mentzelia multiflora (Nutt.) A. Gray. Adonis Blazing Star (Oth) CC:5

Montiaceae

Claytonia rosea Rydb. Rocky Mountain Springbeauty (Obs) CC:7

Nyctaginaceae

Mirabilis linearis (Pursh) Heimerl. Narrowleaf Four O'Clock (Oth) CC:5

Onagraceae

Oenothera coronopifolia Torr. & A. Gray. Crownleaf Evening Primrose. Hierba de San Juan. (Oth) CC:4

Orobanchaceae

Castilleja integra A. Gray. Wholeleaf Indian Paintbrush (Obs) CC:6

Plantaginaceae

Collinsia parviflora Lindl. Maiden Blue-eyed Mary (Obs) CC:4

Linaria dalmatica (L.) Mill. Dalmatian ToadFlax (Obs) CC:0

Linaria vulgaris Mill. Butter and Eggs (Obs) CC:0

Penstemon glaber Pursh glaber. Sawsepal Penstemon (Oth) CC:?

Penstemon secundiflorus Benth. Sidebells Penstemon (Oth) CC:6

Penstemon strictus Benth. Rocky Mountain Penstemon (Obs) CC:5

Penstemon virens Pennell ex Rydb. Front Range Beardtongue (Obs) CC:7

Polygonaceae

Eriogonum arcuatum Greene, Pittonia. 4: 319. 1901. arcuatum. Baker's Buckwheat (Obs) CC:6

Eriogonum umbellatum Torr. umbellatum. Sulphur-Flower Buckwheat (Obs) CC:6

Ranunculaceae

Clematis ligusticifolia Nutt. Western White Clematis (Obs) CC:4

Clematis orientalis L. Oriental Virginsbower (Obs) CC:0

Delphinium nuttallianum Pritz. Twolobe Larkspur (Obs) CC:6

Ranunculus repens L. Creeping Buttercup (Obs) CC:0

Rosaceae

Amygdaloideae

Amygdaleae

Prunus americana Marshall. American Plum (Obs) CC:6

Prunus virginiana L. Chokecherry (Obs) CC:4

Maleae

Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. Saskatoon Serviceberry (Obs) CC:6

Amelanchier utahensis Koehne. Utah Service-Berry (Obs) CC:6

Cotoneaster lucidus Schltdl. Hairy Stem Cotoneaster (Obs) CC:0

Malus domestica (Suckow) Borkh. Common Apple (Obs) CC:0

Neillieae

Physocarpus monogynus (Torr.) J.M. Coult. Mountain Ninebark (Obs) CC:7

Spiraeeae

Holodiscus discolor (Pursh) Maxim. dumosus (S. Watson) Maxim. Ex J. M. Coult. Rock Spiraea (Obs) CC:8

Holodiscus dumosus (Nutt. ex Torr. & A.Gray) A.Heller. Rock Spiraea (Oth) CC:8

Dryadoideae

Dryadeae

Cercocarpus montanus Raf. Alder-Leaf Mountain Mahogany (Obs) CC:6

Rosoideae

Colurieae

Geum aleppicum Jacq. Avens (Oth) CC:6

Roseae

Rosa woodsii Lindl. Mountain Rose (Obs) CC:5

Rubeae

Rubus deliciosus Torr. Delicious raspberry (Obs) CC:6

Rubiaceae

Galium aparine L. Sticky Willy, Cleavers (Obs) CC:1

Salicaceae

Populus alba L. White Cottonwood (Obs) CC:0

Populus angustifolia E. James. Narrowleaf Cottonwood (Obs) CC:5

Populus deltoides Marshall monilifera (Aiton) Eckenw. Plains Cottonwood (TAS+Obs) CC:3

Populus tremuloides Michx. Quaking Aspen (Obs) CC:5

Salix exigua Nutt. Coyote Willow, Narrow-Leaved Willow (Obs) CC:3

Salix ligulifolia (C. R. Ball) C. R. Ball ex C. K. Schneider. Strap-Leaf Willow (Oth) CC:?

Salix monticola Bebb. Park Willow (Oth) CC:6

Sapindaceae

Acer glabrum Torr. glabrum. Rocky Mountain Maple (Obs) CC:7

Acer negundo L. Box Elder (Obs) CC:4

Saxifragaceae

Heuchera parvifolia Nutt. ex Torr. & A. Gray. Littleleaf Alumroot (Obs) CC:7

Scrophulariaceae

Scrophularia lanceolata Pursh. Lanceleaf Figwort (Obs) CC:5

Verbascum thapsus L. Common Mullein (Obs) CC:0

Solanaceae

Solanum rostratum Dunal. Buffalo Bur Nightshade (Obs) CC:2

Ulmaceae

Ulmus pumila L. Siberian Elm (Obs) CC:0

Verbenaceae

Verbena bracteata Lag. & Rodr. Large Bract Vervain (Obs) CC:2

Violaceae

Viola canadensis L. Canadian White Violet (Obs) CC:7

Vitaceae

Vitis riparia Michx. Riverbank Grape (Obs) CC:5

Asparagaceae

Agavoideae

Agaveae

Yucca glauca Nutt. Soapweed Yucca (Obs) CC:4

Nolinoideae

Polygonateae

Maianthemum stellatum (L.) Link. Starry False Lily of the Valley (Obs) CC:7

Commelinaceae

Tradescantia occidentalis (Britton) Smyth. Prairie Spiderwort (Obs) CC:5

Cyperaceae

Carex brevior (Dewey) Mack. Shortbeak Sedge (Oth) CC:5

Carex nebrascensis Dewey. Nebraska Sedge (Obs) CC:5

Carex pellita Muhl. ex Willd. Wooly Sedge (Obs) CC:6

Iridaceae

Iris L. Horticultural Iris (Obs) CC:0

Orchidaceae

Platanthera aquilonis Sheviak. Northern Green Orchid (Oth) CC:7

Poaceae

Aveneae

Phleum pratense L. Timothy (Obs) CC:0

Bromeae

Bromus tectorum L. Cheat Grass (Obs) CC:0

Poeae

Dactylis glomerata L. Orchard Grass (Obs) CC:0

Vulpia octoflora (Walt.) Rydb. Six Weeks Fescue (Oth) CC:3

Triticeae

Agropyron cristatum (L.) Gaertn. Crested Wheat Grass (Obs) CC:0

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Date and time this article was prepared:3:14:51 PM, 8/1/2026.