Acer pensylvanicum L.
Coefficient of Conservatism: 5
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt Tree

Acer pensylvanicum B. S. Walters

Rich deciduous forests, conifer-hardwoods, sandy forested bluffs, occasionally in cedar swamps. The westernmost point in the range of this species (which occurs east to Gaspe and south in the Appalachians) is apparently in hardwood forest of the Huron Mountains in northeastern Baraga Co., except for a 1976 collection without habitat but said to be from “one mile east of Eagle River, Keweenaw Co.” It thrives especially well close to the Great Lakes and is less common inland.

A tall shrub or small tree, this species has a trunk rarely over 20 cm in diameter, although trees as large as 35 cm occur in the Huron Mountains. The bark of all but old trunks is a beautiful smooth green, striped with pale green or almost white lines. The distinctive leaf blades have three acuminate tips and are otherwise sharply and finely doubly serrate, often as wide as 15 cm or more; they turn a bright clear yellow in the fall.


Alcona County
Alger County
Alpena County
Antrim County
Baraga County
Benzie County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Delta County
Emmet County
Keweenaw County
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Marquette County
Montmorency County
Muskegon County
Presque Isle County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. September 28, 2021.