Cynoglossum boreale Fernald
Coefficient of Conservatism: 7
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt P-Forb

Borders, openings, and clearings or under dense shade in coniferous or mixed forests (fir, cedar, spruce, pine, birch, aspen, occasionally beech and maple), especially in sandy or rocky soil.

The upper leaves are strongly cordate-clasping, although the lower and basal ones are petiolate. While the species is easily told at a distance from C. officinale, it is much closer to the southern wild comfrey, C. virginianum L. and sometimes is considered only a variety or subspecies of the more southern plant, which has slightly larger nutlets, calyx, and flowers. Records south of the middle of the Lower Peninsula are all more than a century old. 


Alger County
Alpena County
Baraga County
Benzie County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Crawford County
Delta County
Emmet County
Gogebic County
Grand Traverse County
Gratiot County
Houghton County
Ionia County
Iosco County
Iron County
Kent County
Keweenaw County
    Including Isle Royale
Lake County
Leelanau County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Marquette County
Mason County
Menominee County
Muskegon County
Ogemaw County
Ontonagon County
Oscoda County
Otsego County
Presque Isle County
St. Clair County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 30, 2022.