United States, Minnesota, Lake, Along the Tomahawk Trail in strongly rolling morainal terrain along the upper reaches of the North Branch of the Manitou River, five miles east-southeast of Isabella, 12 miles north of Finland. In a small basin south of Divide Lake. SW1/4 of NW1/4 Sec. 17, Superior National Forest
47.443058 -91.063907 +-16614m.
T059N R07W sec17
Local on the shore of a shallow 3-acre pond. Forming dense patch in moist mucky substrate in zone exposed by receding water levels (recent drought). Full sun.
Associated species include Glyceria borealis, Eleocharis ovata, Dulichium arundinaceum, Bidens cernua, Polygonum amphibium.