21 September 2010.
Minnesota, United States
Locality: Rice Lake National Wildlife Refuge, near Mandy Lake and Rice Lake, McGregor, Sections 21, 22, 23, 28, and 29, T47N, R24W, McGregor and Kimberly Quads, Aitkin County.
Coordinates: 46.5388, -93.3616
(Map it)
Elevation: 384m.
Georeference protocol: Lat/lon determined by GPS
Number of plants sampled: 30
Comment: Population covering approximately two square miles. Lat/lon for approximate center of population.
Collector(s):