11 August 2005.
Colorado, United States
Locality: North side of Highway 7, South St. Vrain Canyon, pull off at mile marker 26, Boulder County.
Coordinates: 40.1761, -105.3589
(Map it)
Elevation: 2529m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Very steep, rocky road cut north of pullout.
Comment: Population size ~200; past peak flowering. H. annuus also present. Collected seed from a few plants ~2 miles east.
Collector(s):