Collected
17 October 2005.
Arizona, United States
Elevation: 1047m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Slope: 0-30 degrees. Orange-brown soil.
Number of plants sampled: 560
Comment: Collected by Bureau of Land Management, USA. Semidesert grassland. Associated with Juniperus sp., Quercus sp., Mahonia haematocarpa, Canotia holacantha, Mimosa sp., Acacia constricta, Arctostaphylos sp., Purshia sp., Agave sp., Opuntia sp.