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Hordeum jubatum L.
Common Name: SQUIRREL-TAIL GRASS
Coefficient of Conservatism: *
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Ad P-Grass

Roadsides, railroads, and disturbed ground generally; also in more natural habitats such as shores. A common weed introduced from the west and first collected in 1875 in Ionia Co., though known from the shores of Lake Superior as early as the 1880’s and conceivably in small part native.

The florets of the lateral spikelets of each group of 3 in this species are reduced to inconspicuous bristles; these spikelets are short-pediceled, the awn-like glumes on the pedicel thus forming a Y-shaped structure with the bristle-like reduced floret at the fork. The awns of the narrow fertile central floret are similar to the glumes of all three spikelets, and the entire spike appears to be a large mass of upwardly scabrous awns, making most unmanageable specimens when the dry rachis separates between each group of spikelets.

Locations

Alcona County
Alger County
Alpena County
Arenac County
Baraga County
Bay County
Berrien County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Dickinson County
Emmet County
Genesee County
Gladwin County
Gogebic County
Gratiot County
Houghton County
Ingham County
Ionia County
Iosco County
Iron County
Isabella County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
    Including Isle Royale
Lenawee County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Macomb County
Marquette County
Mecosta County
Menominee County
Midland County
Monroe County
Montcalm County
Montmorency County
Muskegon County
Oakland County
Ontonagon County
Ottawa County
Presque Isle County
Saginaw County
Sanilac County
Schoolcraft County
Shiawassee County
St. Clair County
St. Joseph County
Tuscola County
Van Buren County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. February 1, 2023. https://michiganflora.net/species.aspx?id=2137.