United States, Minnesota, Cook, Cook Co. At the edge of the Lower Stump River at the Arrowhead Trail crossing T64NR3E sec.22 NESWNE.;Grand Portage State Forest;064N;03E;22
48.014674 -90.00009 +-969m.
With Glyceria canadensis, G. borealis, Leersia oryzoides, Cicuta bulbifera, & Triadenum fraseri