United States, Wisconsin, Vernon, 6.2 km. (air) NE of Readstown, along floodplain of Elk Creek (and of Kickapoo River), .4 km (air) upstream and NE from confluence with Kickapoo River, S. of Hwy. U and W of East River Road
Farm fields (soybeans and corn) with associated weeds of low areas such as Capsella bursa-pastoris, Thlaspi arvense, Veronica peregrina, Ranunculus sceleratus, and brushy and wooded edges, with Acer saccharinum, A. negundo, Viburnum lentago and large patches of Salix exigua.
With Thalictrum dasycarpum, forming a large patch, with long rhizomes. Not yet with many blooming stems.