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Common Name:
CANADA BLUEGRASS
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Coefficient of Conservatism:
*
Coefficient of Wetness:
3
Wetness Index:
FACU
Physiognomy:
Ad P-Grass
R. W. Smith
Widespread in old fields, roadsides, disturbed ground, rocky or sandy forests and openings (oak, aspen, jack pine), usually in dry places but sometimes on shores and in moist forests. Introduced from Europe very early and first collected in 1838 in Washtenaw Co.
This species and P. pratensis are two of our commonest grasses. They are generally segregated from our other species of Poa by the presence of creeping rhizomes, the plants thus forming large colonies. While a useful field character, the rhizomes may not be evident on specimens merely picked or pulled hastily from the ground. Hence, the presence of rhizomes was not emphasized in the key. Poa compressa differs from P. pratensis in the flattened, less tufted culms, lemmas with obscure intermediate nerves and sparse or even absent web at the base, and a tendency toward a more slender panicle with fewer branches at each node. Elongated vegetative stems, with nodes and internodes are common in P. compressa, but in P. pratensis, vegetative shoots are short and the stem-like portion is composed of overlapping leaf sheaths.
Locations
Alcona County
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Alger County
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Allegan County
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Alpena 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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Eaton 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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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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Jackson 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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Including Fox Islands
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Including Manitou Islands
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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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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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Monroe 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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Oscoda 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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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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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=2195.