28 February 2005.
California, United States
Locality: Southern Region of Imperial Sand Dunes, just south of Interstate 8, Buttercup Valley (temporarily closed area; access by walking), Bureau of Land Management, Imperial County.
Coordinates: 32.7281, -114.9042
(Map it)
Elevation: 66m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Active sand dunes.
Number of plants sampled: 50
Comment: Population size 100.
Collector(s):