U.S.A., Wyoming, Teton, Yellowstone Plateau: Yellowstone National Park: along Mountain Ash Creek, 1/8-1/4 mi S of Union Falls, ca 6 mi NW of Grassy Lake Reservoir.
T49N R116W S30
2067 meters
6780 ft.
Spruce swamp and streamside with Calamagrostis canadensis, Ledum glandulosum, Menziesia ferruginea var. glabella, and Angelica arguta.