United States, Minnesota, Swift, Monson Lake State Park. Swift County...Ca. 10 mi. NNE of Kerkhoven; Monson Lake State Memorial Park...Monson Lake...W1/2 NE1/4 NW1/4 Sec. 1 T121N R37W. 121N 37W 1
45.318174 -95.265442 +-800m. WGS84
in moist to wet soil along shore ... with Scirpus fluviatilis, Carex atherodes, C. hystericina, Sparganium eurycarpum.