26 May 1997.
Texas, United States
Locality: Young County; Approximately 2.5 miles west of Newcastle, Texas.
Environment description: Cultivated and grazed in the past. Grazed and roadway now. Slope 0-5%. Open, sand/loam, seasonallt dry, stream terrace. pH 7.7.
Number of plants sampled: 50
Collector(s):