United States, Wisconsin, Barron, Beaver Dam Lake
T35N R13W sec06
Muck bottom in 0-2 meters where it forms dense canopies with other floating leaf species. Common assoc.: (Nuphar variegata) spatterdock, (Eleodea canadensis) common waterweed, (Ceratophyllum demersum) coontail, (Potamogeton zosteriformis) flat-stem pondweed, (Utricularia vulgaris) common bladderwort.
Common to abundant in calm water bays.