Locality: United States, Colorado, Jefferson, Plants of Jefferson County Open Space. Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. Northwest corner of park, 1.7 mi. west on CO highway 72 from CO Highway 93, 2.2 mi. generally north on Plainview Road, then 445 m. west to the base of a east limb of a small hogback, 21.4 km. north northeast of the GNIS location of Golden, 39.897706571°N, -105.275924988°W WGS 1984, Elev. 2030 m. Collected by permit: Jefferson County Open Space, 2019, issued 1 March 2019 to T. Schweich.