12 June 1997.
Oklahoma, United States
Locality: Jackson County; Approx. 5 miles east of Duke, Oklahoma on Hwy 62
Coordinates: 34.6422, -99.5217
(Map it)
Georeference protocol: Lat/lon determined by GPS
Environment description: Roadway, slope 0-5%, aspect S. Open, loam/clay, seasonally dry to always dry, lower slope/plateau. pH 7.9.
Number of plants sampled: 50
Collector(s):