Arnica cordifolia Hook.
Coefficient of Conservatism: 9
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt P-Forb
Status: E

Quite local but attractive where found, in and along the borders (including roadsides) of mixed or deciduous, often rocky or open forests. This is a western species occurring from Alaska south in the mountains to New Mexico and also in the Black Hills of South Dakota and the Riding Mountains of Manitoba. Its disjunct occurrence on the Keweenaw Peninsula (from Copper Harbor to Eagle Harbor) was discovered in 1849; much more recently also found on Isle Royale.


Keweenaw County
    Including Isle Royale


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. May 16, 2022.