Muhlenbergia mexicana (L.) Trin.
Coefficient of Conservatism: 3
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt P-Grass

Common in marshy, swampy, and boggy habitats, stream border thickets, moist hardwoods; also on shores and beaches and in disturbed ground along roads and trails.

Some slender plants approach M. sylvatica, but can usually be distinguished by the more slender glumes (5–8 times as long as wide in M. mexicana, not over 6 times as long as wide in M. sylvatica). Also, the spikelets in M. mexicana are often tinged with purple and form denser, thicker, more closely spaced panicle branches than in M. sylvatica. All our M. sylvatica have conspicuously awned lemmas, and most of our M. mexicana have essentially awnless lemmas, affording an easy separation of the two. Unfortunately, some of our plants, scattered througout the state, are M. mexicana f. ambigua (Torr.) Fernald, with long-awned lemmas.


Alcona County
Alger County
Allegan County
Alpena County
Bay County
Berrien County
Calhoun County
Cass County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Clinton County
Crawford County
Delta County
Dickinson County
Emmet County
Gogebic County
Grand Traverse County
Gratiot County
Hillsdale County
Houghton County
Huron County
Ingham County
Ionia County
Iron County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Lake County
Leelanau County
Lenawee County
Livingston County
Mackinac County
Macomb County
Manistee County
Marquette County
Mason County
Mecosta County
Menominee County
Midland County
Monroe County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Ogemaw County
Ontonagon County
Oscoda County
Ottawa County
Roscommon County
Saginaw County
Sanilac County
Schoolcraft County
St. Clair County
Van Buren County
Washtenaw County
Wayne County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. August 13, 2022.