United States, Minnesota, Clay, Audubon Prairie: 16.5 mi. ESE of Moorhead. NW1/4 S1/4 Sec. 32, T139N, R45W.;Audubon Prairie, The Nature Conservancy;139N;45W;32
46.812051 -96.515485 +-951m.
Along dividing ditch with Solidago canadensis, Ruxex sp., Lactuca pulchella.