United States, Minnesota, Mahnomen, White Earth Indian Reservation. Mahnomen Co.; Located 6 miles northeast of the town of Nay-tah-waush. Plants occur along the southeast shore of Long Lak Mahnomen Co.; Located 6 miles northeast of the town of Nay-tah-waush. Plants occur along the southeast shore of Long Lake; T 145N R 39W SE1/4 of SE1/4 of Sec 24. 145N 39W 24
47.3613664 -95.5618986 +-800m.
Plants occur along the southeast shore; Associated with Zizania palustris, Potamogeton pectinatus, Lemna trisulca, Sparganium eurycarpum.