Carex oligosperma Michx.
Common Name: SEDGE
Coefficient of Conservatism: 10
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt P-Sedge

Usually in bogs, where its rhizomatous habit makes it a mat-former rivaling in importance C. lasiocarpa, with which it is rather frequently confused when vegetative; relic in older coniferous swamps and also found on wet lake shores, in acidic soils. The narrow, involute leaves are similar to those of C. lasiocarpa, but less wiry, the basal sheaths are much spongier than the hard ones of C. lasiocarpa, and the ventral surface of the lower leaf sheaths do not tear to form a ladder-like arrangement of fibers.

Locations

Alcona County
Alger County
Allegan County
Alpena County
Antrim County
Baraga County
Barry County
Benzie County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
Crawford County
Delta County
Dickinson County
Emmet County
Gogebic County
Hillsdale County
Houghton County
Ionia County
Iron County
Jackson County
Kalamazoo County
Kalkaska County
Kent County
Keweenaw County
    Including Isle Royale
Lake County
Leelanau County
Livingston County
Luce County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Marquette County
Mason County
Mecosta County
Menominee County
Missaukee County
Montcalm County
Montmorency County
Muskegon County
Newaygo County
Oakland County
Ontonagon County
Osceola County
Otsego County
Ottawa County
Presque Isle County
Roscommon County
Sanilac County
Schoolcraft County
St. Clair County
St. Joseph County
Washtenaw County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 15, 2017. http://michiganflora.net/species.aspx?id=1019.