Query: G.N.I.S.

See also: Clear Creek Canyon. Clear Creek Canyon Park. Parfet Open Space (City of Golden).

See also: Lower Chimney Gulch. Welch Ditch (Open Space).

Elevation: 5738ft, 1749m.

Articles that refer to this location:

• Climbing Access Trail, Clear Creek Canyon Park, Jefferson County, Colorado: at Welch Ditch; 
• Denver West Parkway: at trail; 
• Chimney Gulch Trail, Jefferson County, Colorado: at junction; 
• Checklist Flora of Native and Naturalized Vascular Plants of Golden and Vicinity, Jefferson County, Colorado: Parfet OS;  Holodiscus discolor var. dumosus;  Hesperis matronalis;  Sorbus aucuparia; 
• Ancient Palms Trail, South Table Mountain Park, Jefferson County, Colorado: 89000; 
• Welch Ditch, Jefferson County, Colorado: at concrete lid; 
• Peaks to Plains Trail, Clear Creek and Jefferson Counties, Colorado: at suspension bridge; 
• Field Notes: April 4, 1903;  3 Jun 2020;  Coll. No. 2315, 3 Jun 2020;  Coll. No. 2316, 3 Jun 2020;  9 Mar 2021;  5 May 2021;  20210519;  7 Jun 2021;  14 May 2023;  29 Aug 2023;  30 Aug 2023;  29 Mar 2024; 

Area Plant Lists that contain this location:

• Area Plant List for City of Golden Open Space.
• Area Plant List for Golden.

A big patch of Myrtle Spurge beside the ditch.	Lots to see in this photo.	Golden from the Welch Ditch.	Where I found Cotoneaster lucidus -- thanks to Cindy.	Hesperis matronalis in the ditch.
Waste gate on Welch Ditch.	Cascade coming from Windy Saddle.	Viola canadensis beside the Welch Ditch.	Commemorative Plaque for resonstruction of the Welch Ditch, 1932.	Junk car along the ditch.
Gate on the Welch Ditch.

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.

Pinaceae

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

Amaranthaceae

Froelichia gracilis (Hook.) Moq. Slender Snakecotton (TAS) CC:4

Apiaceae

Selineae

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

Boraginaceae

Cynoglossum officinale L. Gypsyflower (TAS) CC:0

Brassicaceae

Hesperis matronalis L. Dame's Rocket (TAS) CC:0

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

Cannabaceae

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

Caryophyllaceae

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

Crassulaceae

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

Hydrangeaceae

Jamesia americana Torr. & A. Gray americana. Fivepetal Cliffbush (TAS) CC:7

Polygonaceae

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

Rosaceae

Amygdaloideae

Maleae

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

Sorbus aucuparia L. European Mountain Ash (TAS) CC:0

Neillieae

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

Spiraeeae

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

Santalaceae

Comandra umbellata (L.) Nutt. pallida (A. DC.) Piehl. Pale Bastard Toadflax (TAS) CC:5

Sapindaceae

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

Scrophulariaceae

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

Undet.

Undetermined. (Obs) CC:?

Asparagaceae

Nolinoideae

Polygonateae

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

Poaceae

Aveneae

Koeleria macrantha (Ledeb.) Schult. Prairie Junegrass (TAS) CC:6

Bromeae

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

Poeae

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

Stipeae

Eriocoma hymenoides (Roem. & Schult.) Rydb. Indian Rice Grass (Obs) CC:3

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Date and time this article was prepared:3:15:41 PM, 8/1/2026.