20 September 2010.
Arizona, United States
Locality: Between Interstate Highway 10 and the intersection of West Colorado Street and North Riverside Road, Santa Cruz River bed, Tucson, Pima County.
Coordinates: 32.2319, -110.9850
(Map it)
Elevation: 710m.
Georeference protocol: Lat/lon determined by GPS
Environment description: One of the higher parts of a generally dry channelized river bed. Full sunlight. Near Setaria and Tamarix.
Number of plants sampled: 30
Collector(s):