United States, Minnesota, Roseau, Lost River State Forest. Roseau County...at the southwest arm of Marvin Lake, about 1.5 mile south of the international boundary (Minnesota-Manitoba), in Lost River State Forest...T 164N R37W SW1/4 of NW1/4 of Sec. 33. 164N 37W 33
48.9713889 -95.9405556
On marshy bank dominated by Typha latifolia and Scirpus acutus. Associated with Lycopus uniflorus, Scutellaria glaericulata, Carex diandra.