23 September 2003.
Iowa, United States
Locality: Rattlesnake Bluff, Keosauqua, T69N R9W, SE 1/4 of NW 1/4, Section 21, Mount Zion Quad, Van Buren County.
Coordinates: 40.7636, -91.9036
(Map it)
Elevation: 195m.
Georeference protocol: Lat/Lon determined via Map location
Environment description: Ridgetop. 1/3 to 1/2 sunny. Flat slope with a mostly southern aspect. Rocky. Associated with Carya ovata, Quercus imbricaria, Q. muehlenbergii, Q. alba, and Ostrya.
Number of plants sampled: 10
Comment: Occasional population abundance with irregular distribution. 50 plants found.
Collector(s):