United States, Wisconsin, Polk, Horseshoe Lake. Polk/Barron Counties [Polk Co. from Lat. Long.]
45.4415° N, 92.16265° W; T34N R15W sec12
Thick muck soil in and out of water <0.5 meters. Common assoc.: (Phalaris arundinacea) reed canary grass, (Sagittaria latifolia) common arrowhead, (Pontederia cordata) pickerelweed, (Schoenoplectus tabernaemontani) softstem bulrush,
Scattered undeveloped shoreline locations; especially common along the shoreline of "Mud Lake" where it formed dense.