Collected
21 June 2005.
Arizona, United States
Elevation: 692m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Slope: 20-60 degrees. Aspect: N-NW. Tan clay-silt-sand.
Number of plants sampled: 114
Comment: Collected by Bureau of Land Management, USA. Sonoran desert scrub, Arizon upland. Associated with Carnegia giganea, Fouquieria splendens, Parkinsonia microphylla, Simmondsia chinensis, Opuntia sp., Ephedra sp., Cylindropuntia sp., Dodonaea sp.