Dichanthelium columbianum (Scribn.) Freckmann
Common Name: PANIC GRASS
Synonym: Panicum columbianum
Coefficient of Conservatism: 5
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt P-Grass

Panicum columbianum of Michigan Flora.

Dry sandy open ground, thickets, and forests (jack pine, oak, and/or aspen), dune ridges, pine forests, and less often on moist shores.

This species is quite variable in amount of pubescence, in shape of the first glume, and in size of spikelets and leaves, although the double vestiture of sheaths is always characteristic. Subsumed (along with many other entities) into an extraordinarily variable Dichanthelium acuminatum as subsp. columbianum (Scribn.) Freckmann & Lelong.

Some glabrate or older and weather-beaten specimens may have the double vestiture obscure. These superficially resemble D. implicatum, but may often be distinguished by longer spikelets and longer, more acute first glume, and the presence of fine pubescence typical of plants with double vestiture.

Locations

Alcona County
Alger County
Allegan County
Alpena County
Arenac County
Baraga County
Barry County
Bay County
Berrien County
Calhoun County
Cass County
Cheboygan County
Chippewa County
Clare County
Clinton County
Crawford County
Delta County
Dickinson County
Emmet County
Gladwin County
Gratiot County
Hillsdale County
Houghton County
Huron County
Iosco County
Iron County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
Lake County
Lapeer County
Leelanau County
    Including Fox Islands
Lenawee County
Livingston County
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Macomb County
Marquette County
Mason County
Mecosta County
Menominee County
Midland County
Montcalm County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Oceana County
Ogemaw County
Ontonagon County
Oscoda County
Ottawa County
Presque Isle County
Roscommon County
Saginaw County
Schoolcraft 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 12, 2017. http://michiganflora.net/species.aspx?id=2069.