Acer negundo L.
Common Name: BOX-ELDER, ASH-LEAVED MAPLE, MANITOBA MAPLE
Coefficient of Conservatism: 0
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Nt Tree

Native at least in the southern half of the Lower Peninsula, and apparently northward on some river banks and floodplains as far as Baraga and Houghton Cos. of the western Upper Peninsula. Widely cultivated and readily escaping throughout the state; a weed in some places. Swamps, shores, and banks; spreading aggressively so that seedlings and small (to large) trees are common along fencerows, sidewalks, railroads, ditches, and disturbed places generally; invading old fields and open forests.

The leaflets are usually 3–5, rarely 7. Small plants, such as seedlings, with 3 leaflets can easily be confused with poison-ivy until one notices that the leaves are opposite.

Locations

Alcona County
Allegan County
Alpena County
Antrim County
Arenac County
Baraga County
Barry County
Benzie County
Berrien County
Calhoun County
Cheboygan County
Clinton County
Dickinson County
Eaton County
Emmet County
Genesee County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Huron County
Ingham County
Ionia County
Iron County
Isabella County
Jackson County
Kalamazoo County
Kent County
Keweenaw County
Lake County
Lapeer County
Leelanau County
    Including Fox Islands
Lenawee County
Livingston County
Mackinac County
    Only on Bois Blanc, Mackinac, Round Islands
Marquette County
Mason County
Mecosta County
Menominee County
Monroe County
Montcalm County
Muskegon County
Newaygo County
Oakland County
Ogemaw County
Ontonagon County
Ottawa County
Roscommon County
Saginaw County
Schoolcraft County
Shiawassee County
St. Clair County
St. Joseph County
Tuscola County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 16, 2017. http://michiganflora.net/species.aspx?id=2649.