16 August 2005.
Wyoming, United States
Locality: Both sides of Silver Springs Road (Road 54), 9.2 miles south of Highway 18/20 (southwest of Lusk), Niobrara County.
Coordinates: 42.6400, -104.5253
(Map it)
Elevation: 1722m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Roadside grassy meadow. Open pine and brush in distance.
Comment: Population size ~500; plants mostly past flowering. H. annuus present.
Collector(s):