Common Name:
SPECKLED ALDER
Synonym:
Alnus rugosa
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Coefficient of Conservatism:
5
Coefficient of Wetness:
-3
Wetness Index:
FACW
Physiognomy:
Nt Shrub
R. W. Smith
A. rugosa of Michigan Flora.
A common tall shrub in older zones of bogs, along lakes and streams, in extensive mucky swamps, and in all sorts of wetlands. Our plants are subsp. rugosa (Du Roi) Clausen; subsp. incana is restricted to Europe.
The pistillate aments are often attacked by a fungus (Taphrina), which causes hypertrophy; the resulting elongate proliferations from the ament are quite unlike the normal scales and are easily recognized as an abnormality.
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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Baraga County
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Bay County
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Benzie County
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Berrien 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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Emmet County
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Genesee County
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Gladwin 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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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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Luce County
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Mackinac County
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Including 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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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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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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Saginaw 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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Tuscola County
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Van Buren 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. April 4, 2020. https://michiganflora.net/species.aspx?id=548.