Cladium mariscoides (Muhl.) Torr.
Common Name: TWIG-RUSH
Coefficient of Conservatism: 10
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Sedge

Sandy, boggy, or marshy shores, sometimes in shallow water; sphagnum bogs, where the rhizomes are an important component of floating mats; ponds and interdunal swales, fens; often in marly places.

The achenes are very distinctive; they are somewhat acorn-shaped at maturity, squarely truncate and often a little flaring at the base. Occasionally, the spongy basal tissue that “fills out” the achene to give it the acorn shape does not develop, leaving the achenes broadly ellipsoid.

Locations

Alcona County
Alger County
Allegan County
Alpena County
Antrim County
Arenac County
    Only on Charity Island
Baraga County
Barry County
Bay County
Benzie County
Berrien County
Calhoun County
Cass County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Clare County
Clinton County
Crawford County
Emmet County
Gogebic County
Grand Traverse County
Hillsdale County
Houghton County
Huron County
Ingham County
Ionia County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
    Only on Isle Royale
Lake County
Lapeer County
Leelanau County
    Including Manitou Islands
Lenawee County
Livingston County
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Macomb County
Manistee County
Marquette County
Mason County
Mecosta County
Menominee County
Missaukee County
Montcalm County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Ogemaw County
Ontonagon County
Otsego County
Ottawa County
Presque Isle County
Schoolcraft County
St. Clair County
Van Buren County
Washtenaw County
Wayne County
Wexford 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=1084.