22 July 1998.
Oklahoma, United States
Locality: Jefferson County; West of Claypool, Oklahoma firehouse
Coordinates: 34.1586, -97.8142
(Map it)
Georeference protocol: Lat/lon determined by GPS
Environment description: Grazed, slope 0-5% and 6-10%, aspect SE/S/SW. Open, loam/clay, always dry, ridgetop. pH 6.4.
Number of plants sampled: 200
Collector(s):