16 July 1998.
Texas, United States
Locality: Throckmorton County; West of Throckmorton, Texas
Coordinates: 33.1819, -99.3406
(Map it)
Georeference protocol: Lat/lon determined by GPS
Environment description: Roadway, slope 0-5% and 41-60%, aspect N/S. Open, load/clay, always dry, ridgetop/upper slope. pH 7.9.
Number of plants sampled: 50
Collector(s):