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Common Name:
PINEAPPLE-WEED
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Coefficient of Conservatism:
*
Coefficient of Wetness:
3
Wetness Index:
FACU
Physiognomy:
Ad A-Forb
R. W. Smith
Usually considered native to western North America, but migrated eastward in historic times. First collected 1921 (Houghton Co.) and 1925 (Oakland Co.). In the 1930’s, six widely dispersed counties were added to the documented distribution, and the species is still spreading extensively. Usually in relatively bare disturbed sites: roadsides, railroads, cultivated fields and gardens, lawns, cut-over forests, vacant lots, dumps, gravel pits, parking lots, fill, etc. This is one of the few weedy American plants that has apparently spread to (rather than from) Europe.
Locations
Alcona County
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Alger County
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Alpena County
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Antrim County
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Arenac County
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Baraga County
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Benzie County
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Berrien County
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Branch County
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Charlevoix County
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Including Beaver Island
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Cheboygan County
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Chippewa County
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Including Drummond Island
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Clare County
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Crawford County
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Delta County
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Dickinson County
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Eaton County
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Emmet County
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Gladwin County
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Gogebic County
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Gratiot County
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Hillsdale County
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Houghton County
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Huron County
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Ingham County
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Ionia County
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Iosco County
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Iron County
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Isabella County
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Kalamazoo County
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Kalkaska County
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Kent County
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Keweenaw County
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Including Isle Royale
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Lake County
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Lapeer County
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Leelanau County
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Lenawee County
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Luce County
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Mackinac County
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Macomb County
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Marquette County
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Mason County
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Mecosta County
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Menominee County
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Monroe County
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Montmorency County
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Oakland County
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Oceana County
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Ogemaw County
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Ontonagon County
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Osceola County
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Oscoda County
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Otsego County
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Ottawa County
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Presque Isle County
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Roscommon County
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Sanilac County
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Schoolcraft County
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St. Clair County
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St. Joseph County
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Van Buren County
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Washtenaw County
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Wayne County
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Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 30, 2023. https://michiganflora.net/species.aspx?id=406.