20 September 2010.
Arizona, United States
Locality: Northwest side of FR 486 (Helvetia Road), north of FR 410, Santa Rita Experimental Range of the University of Arizona, Pima County.
Coordinates: 31.8246, -110.8611
(Map it)
Elevation: 1123m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Wash valley, but above the level of recent floods. Partial sunlight. Level ground. Sandy soil. Under trees and shrubs. Near Baileya multiradiata, grasses, Opuntia, and Prosopis.
Number of plants sampled: 100
Comment: Plants pull up easily.
Collector(s):