Common Name:
SWAMP MILKWEED
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Coefficient of Conservatism:
6
Coefficient of Wetness:
-5
Wetness Index:
OBL
Physiognomy:
Nt P-Forb
C. Peirce
This is our only milkweed of truly wet ground, often in several centimeters of water: edges of rivers and streams; shores, wet prairies; openings in conifer swamps, fens (less often bogs); depressions in forests, swales and ditches, meadows.
One of our showiest species in its deep color. The leaves are usually smaller and narrower than in A. exaltata, green (not glaucous) beneath.
Locations
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Alcona County
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Alger County
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Allegan County
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Alpena County
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Antrim County
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Arenac County
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Including Charity Island
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Baraga County
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Barry County
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Bay County
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Benzie County
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Berrien County
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Branch County
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Calhoun County
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Cass 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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Clinton 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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Genesee County
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Gogebic County
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Grand Traverse 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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Iosco County
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Isabella County
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Jackson County
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Kalamazoo County
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Kalkaska County
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Kent County
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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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Livingston County
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Luce County
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Mackinac County
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Only on Bois Blanc, Mackinac, Round Islands
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Macomb County
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Manistee 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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Midland County
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Missaukee County
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Monroe County
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Montcalm County
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Montmorency County
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Muskegon County
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Newaygo 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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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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Saginaw County
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Sanilac County
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Schoolcraft County
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Shiawassee County
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St. Clair County
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St. Joseph County
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Tuscola County
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Van Buren County
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Washtenaw County
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Wayne County
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Wexford 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 22, 2019. https://michiganflora.net/species.aspx?id=157.