United States, Minnesota, Mahnomen, Wambach WMA. About 9.2 km north-northeast of Mahnomen. About 2.2 km east of the intersection of US Hwy 59 and T184.
47.39784 -95.94839
T145N R42W sec12
Common in ditch between gravel road and upland prairie. Growing in water 25-30 cm deep with mucky bottom. Ditch shaded by Salix discolor, Salix bebbiana, Cornus sericea, Salix sp.