United States, Wisconsin, Douglas, Minong Flowage [Washburn Co .- original in error based on Lat./Long.]
46.16081° N, 91.91058° W; T43N R12W sec31
Located floating or just under the surface in sheltered areas. Common assoc.: (Nymphaea odorata) white water lily, (Nuphar variegata) spatterdock, (Lemna minor) small duckweed, (Zizania palustris) northern wild rice.
Scattered individuals occur interspersed between the lilypads and wild rice beds of the northern bays.