United States, Minnesota, Cook, On the banks of the Poplar River as it flows through the Superior National Golf Course, in rugged bedrock terrain 1.5 miles west-southwest of Lutsen; ~1/3-mile upstream from Highway 61. NE1/4 of SE1/4 of NW1/4 Sec. 33, SE1/4 of NE1/4 of NW1/4 Sec. 33, Superior National Golf Course
47.639062 -90.708017 +-2959m.
T060N R03W sec33
Occasional locally in the bed of a dry side channel (old oxbow). Gravelly boulder-strewn substrate in habitat that is flooded and scoured during spring runoff and other high water events. Mostly in full sun.
Associates include Populus balsamifera seedlings, Salix lucida, S. discolor, S. bebbiana, Bidens frondosa, Aster umbellatus, Eupatorium maculatum, Lycopus uniflorus, Prenanthes alba, Lotus corniculatus, Plantago major, Agrostis scabra, A. stolonifera, Echinochloa muricata.