13 October 2008.
Illinois, United States
Locality: Along Opossum Creek on US Highway 51, SE 1/4 of SE 1/4 of Section 16, T10N, R1E, Oconee Quad, Shelby County.
Coordinates: 39.3053, -89.0839
(Map it)
Elevation: 200m.
Georeference protocol: Lat/lon determined by GPS
Number of plants sampled: 58
Associated species: Daucus carota, Euphorbia corollata, Helianthus strumosus, Liatris aspera, and Quercus alba.
Collector(s):