United States, Minnesota, Lake, Boundary Waters Canoe Area Wilderness; Rugged bedrock terrain along the Canadian border, 35 miles east-northeast of Ely. In the South Arm of Knife Lake, near a campsite on the point north of the portage to Sema Lake.
48.09403164 -91.15332751
5328400N 637501E; T65N R6W sec19
421 meters
1380 feet
Rare and local on the lakeshore. Loose to fairly dense patch in a small cove. In water less than 3 feet deep. Rooted in coarse gravelly sand amongst cobbles and small boulders. Full sun.
Associates include Equisetum fluviatile, Dulichium arundinaceum.