20 June 2013.
Wyoming, United States
Locality: South of Sweetwater Creek, east of a gully, southeast of the intersection of Route 430 and County Road 27, near Arrowhead Springs.
Coordinates: 41.5297, -109.1766
(Map it)
Elevation: 1995m.
Environment description: Under shrubs, in an area of about one hectare. Not found in adjacent areas under similar shrubs.
Number of plants sampled: 100
Comment: Estimated population size of 300. Plants were dry and seeds were shattering at time of collection. Land owned by the Bureau of Land Management.
Collector(s):