Humulus neomexicanus (A. Nelson & Cockerell) Rydb.  New Mexican Hops.

Welch Ditch, Jefferson County, Colorado. Mouth of Clear Creek Canyon, hill side of Welch Ditch, near junction of climbing access trail and at a gate formerly used to close access to the trail, 3.39 km. (geodesic) west of the GNIS location of Golden. 39.74937°N, 105.25052°W. WGS 1984 Elev. 1717 m. Nearly all above the flume, small amount below, with Clematis ligusticifolia, Ribes cereum, Holodiscus dumosus, and Brickellia californica. GPS coordinates place collection on the Peaks to Plains Trail about 25 m. southwest of actual location, perhaps because of the steepness of the cliffs here. One of three collections made along the Welch Ditch on this date.

Collected by permit: Jefferson County Open Space, 2023, issued: Apr 10, 2023, to: Tom Schweich.