01 October 2012.
Illinois, United States
Locality: West side of and downhill from Railroad Lane, Thompson-Fulton Sand Prairie Nature Preserve, northeast of Fulton, Whiteside County.
Coordinates: 41.9209, -90.1126
(Map it)
Elevation: 183m.
Environment description: Sandy soil.
Comment: Collected with permission from Thompson-Fulton Sand Prairie Nature Preserve, Illinois DNR. Population greater than 500 plants.
Collector(s):