21 September 1996.
Iowa, United States
Locality: West bank of Des Moines River Valley north of Highway 175 east of Dayton, Section 16, Hardin Township, T68N, R27W, Stratford Quad, Webster County.
Coordinates: 42.2583, -94.0000
(Map it)
Elevation: 293m.
Number of plants sampled: 75
Comment: Pop 12.
Collector(s):