19 September 2010.
Arizona, United States
Locality: Plateau on the southwest bank/clifftop, 8 meters above wash, Santa Rita Experimental Range of the University of Arizona, Pima County.
Coordinates: 31.8266, -110.8637
(Map it)
Elevation: 1110m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Full sunlight. Sandy soil. Near Opuntia and Prosopis.
Number of plants sampled: 40
Comment: Plants were in a 10 square meter area.
Collector(s):