19 September 2010.
Arizona, United States
Locality: Lot 2B, northwest of FR 486 (Helvetia Road), and north of the road to Middle Tank, Santa Rita Experimental Range of the University of Arizona, Pima County.
Coordinates: 31.8336, -110.8505
(Map it)
Elevation: 1134m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Shade. Level ground. Sandy soil. Under Prosopis trees. Near Opuntia and Portulaca umbraticola and Talinum.
Number of plants sampled: 6
Comment: Plants were in a 1 square meter area.
Collector(s):