United States, Minnesota, St. Louis, Along the lower reaches of the St. Louis River, ~1/2 mile upstream from the Boy Scout Landing Public Access at New Duluth.
46.65191217 -92.23734072
5166766N 558357E; T48N R15W sec10
183 meters
600 feet
Occasional in the slack water of an alluvial backwater marsh. Submerged in water ~3 feet deep. Clay/silt substrate. Full sun.
Associates include Potamogeton zosteriformis, P. richardsonii, P. nodosus, P. pusillus, P. friesii, P. vaseyi, Nuphar variegatum, Ceratophyllum demersum, Myriophyllum sibiricum, Sagittaria rigida, Zizania palustris.