22 September 2007.
Texas, United States
Locality: Both sides of Highway 18 (mostly east side), 3.7 miles north of Interstate 10, Fort Stockton.
Coordinates: 30.9628, -102.8839
(Map it)
Elevation: 878m.
Georeference protocol: Lat/lon determined by GPS
Environment description: Waterless, grassy irrigation ditch. Gravelly, sandy soil.
Number of plants sampled: 35
Comment: Population size ~150; just past peak flowering.
Collector(s):