United States, Minnesota, Cook, Along the Lake Superior shore at Red Rock Point / Deronda Bay, five miles southwest of Grand Portage, ten miles east-northeast of Hovland. S1/2 of SW1/4 of SW1/4 Sec. 25, Grand Portage Reservation
47.914337 -89.751755 +-969m.
T063N R05E sec25
Uncommon and local on dry bedrock shore. Scattered small clumps growing amongst Xanthoria lichens, along crevices of exposed rhyolite ~20 feet above lake level. Full sun.
Associates include Potentilla tridentata, P. fruticosa, Campanula rotundifolia, Achillea millefolium, Deschampsia cespitosa, Festuca brachyphylla, Trisetum spicatum, Poa glauca.