15 September 2006.
Iowa, United States
Locality: East-southeast across a deep gulley from a primitive campground parking lot, Ledges State Park, NE 1/4 of SW 1/4 of SW 1/4 of Section 15, T83N, R26W, Worth Township, Boone County.
Coordinates: 41.9964, -93.8706
(Map it)
Elevation: 329m.
Environment description: Hilltop savanna. Full sun. Dry (possibly loess) soil.
Associated species: Agalinis tenuifolia, Aristida oligantha, Danthonia spicata, Gnaphalium obtusifolium, Hedeoma pulegioides, Hieracium scabrum, Lechea stricta, Lespedeza capitata, Lobelia inflata, L. spicata, Polygala verticillata, Solidago nemoralis, Spiranthes magnicamporum, and Vulpia octoflora.
Comment: Population of >100.
Collector(s):