15 August 2005.
Wyoming, United States
Locality: Both sides of Iron Mountain Road (Road 10), 0.8 and 5.2 miles southwest of Interstate 25, Exit 54 (Chugwater), Platte County.
Coordinates: 41.7522, -104.8428
(Map it)
Elevation: 1633m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Steep, rocky roadcut and roadside ditches. No trees.
Comment: Population sizes 20 (south site) and 200; much past peak flowering. H. annuus and H. petiolaris nearby. Latitude and longitude values were taken from the northern, and much larger population.
Collector(s):