United States, Minnesota, Cook, Boundary Waters Canoe Area Wilderness, Along the northern shore of Brule Lake, in fairly rugged bedrock terrain 20 miles northwest of Grand Marais. T63N R3W SE1/4 of NE1/4 Sec. 12
47.95549472 -90.63829444
5314053N 676319E; T63N R03W sec12
Frequent to abundant in shallow water in the inner (northern) portion of North Bay. Plants entirely submersed. Specimen collected from a dense mat of plants floating in a small, shallow, rocky, shoreline cove.