Glyceria grandis S. Watson
Common Name: REED MANNA GRASS
Coefficient of Conservatism: 6
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Grass

Glyceria grandis R. W. Smith

River and stream margins, ditches and swales, marshes, shores, bogs, meadows – often in shallow water.

A much more robust plant in all aspects than G. striata, with generally a stouter culm, broader leaf blades, and much larger panicles, the last usually 22–40 cm high (rarely as short as 13 cm). The spikelets are about 4–6.5 mm long.

Locations

Alcona County
Alger County
Alpena County
Arenac County
Baraga County
Bay County
Cass County
Charlevoix County
    Only on Beaver Island
Cheboygan County
Chippewa County
Clinton County
Delta County
Dickinson County
Emmet County
Genesee County
Gogebic County
Gratiot County
Houghton County
Huron County
Ingham County
Iron County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
    Including Isle Royale
Lake County
Lapeer County
Lenawee County
Mackinac County
Macomb County
Manistee County
Marquette County
Mason County
Menominee County
Midland County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Ogemaw County
Ontonagon County
Osceola County
Ottawa County
Presque Isle County
Roscommon County
Schoolcraft County
Shiawassee County
St. Clair 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. December 18, 2017. http://michiganflora.net/species.aspx?id=2128.