01 October 2007.
New Mexico, United States
Locality: West side of Highway 1, 1.1 miles south of junction with Highway 380, San Antonio.
Coordinates: 33.9019, -106.8686
(Map it)
Elevation: 1383m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Grassy, weedy fence row next to irrigated field. Silty clay soil. Associated with Helianthus annuus.
Number of plants sampled: 50
Comment: Population size ~300.
Collector(s):