Petasites frigidus (Aiton) A. Gray
Common Name: SWEET-COLTSFOOT
Synonym: Petasites palmatus
Coefficient of Conservatism: 10
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt P-Forb

Moist forests, coniferous and mixed, including cedar and tamarack swamps and some rocky sites; seems to bloom best along trails and after clearing.

This is our only relatively common species, represented by var. palmatus (Aiton) Cronquist. Large clones of leaves are often noted in the summer, but because of the early blooming this species is doubtless under-collected.

Locations

Alcona County
Alger County
Alpena County
Antrim County
Baraga County
Benzie County
Charlevoix County
    Only on Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Crawford County
Delta County
Dickinson County
Emmet County
Gogebic County
Grand Traverse County
Houghton County
Iosco County
Iron County
Kalkaska County
Keweenaw County
    Including Isle Royale
Lake County
Leelanau County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Marquette County
Midland County
Montmorency County
Newaygo County
Oakland County
Ontonagon County
Oscoda County
Presque Isle County
Schoolcraft County
St. Clair County
Tuscola County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 15, 2017. http://www.michiganflora.net/species.aspx?id=420.