Collected
11 May 2005.
United States
Elevation: 348m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Slope: 0-15 degrees. Light tan soil.
Number of plants sampled: 500
Comment: Maricopa County, AZ. Collected by Bureau of Land Management, USA. Sonoran desert scrub, lower Colorado River valley. Associated with Parkinsonia sp., Carnegiea gigantea, Larrea tridentata, Ambrosia deltoidea, Phacelia sp., Plantago ovata, Schismus sp.