United States, Wisconsin, Sawyer, Chetac Lake
45.74806° N, 91.46698° W; T38N R09W sec27
Located floating or just under the surface in stagnant bays. Common assoc.: (Nymphaea odorata) white water lily, (Nuphar variegata) spatterdock, (Ceratophyllum demersum) coontail, (Potamogeton pusillus) small pondweed.
Common, but less so than small duckweed. Scattered individuals occur interspersed between the lilypads and wild rice beds.