United States, Wisconsin, Polk, North Pipe Lake
T35N R15W sec10
Rocky to sandy bottoms in 0-1.5 meters of water. Common assoc.: (Myriophyllum tenellum) dwarf water milfoil, (Ranunculus flammula) creeping spearwort, (Eleocharis acicularis) needle spikerush, (Utricularia resupinata) small purple bladderwort.
Relatively common in north lake to locally abundant in main lake where it forms thick mats in shallow water. Emergent form located along shore interspersed among other emergents.