06 October 1997.
Indiana, United States
Locality: 1/2 mile west of Kankakee River on Indiana Highway 6, Section 15, Union Township, T35N, R2W, Hamlet Quad, LaPorte County.
Coordinates: 41.3167, -86.6167
(Map it)
Elevation: 207m.
Environment description: Corn field margin.
Number of plants sampled: 25
Comment: Pop 46. Population of approximately 200.
Collector(s):