Carex castanea Wahlenb.
Common Name: SEDGE
Coefficient of Conservatism: 6
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt P-Sedge

Carex castanea A. A. Reznicek

Cedar and cedar-fir forests and borders, wet meadows, rich moist deciduous or mixed forests, jack pine plains, rock pools along Lake Superior. A calciphile especially characteristic of margins of mixed coniferous forests on thin soil over limestone, and here often found with C. capillaris, which it resembles in general habit (although larger and pubescent).

Carex ×knieskernii Dewey is the hybrid with C. arctata, and occurs sparingly where the parents come into contact. It is sterile and more or less intermediate in morphology, with spikes longer and narrower than C. castanea, almost as narrow as in C. arctata, and hairy foliage. The rarer hybrid C. castanea × C. gracillima resembles C. ×knieskernii closely, but has shorter beaks. 

Locations

Alcona County
Alger County
Alpena County
Antrim County
Arenac County
Baraga County
Benzie County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Clare County
Crawford County
Delta County
Dickinson County
Emmet County
Grand Traverse County
Houghton County
Huron County
Iosco County
Iron County
Kalkaska County
Keweenaw County
    Including Isle Royale
Lake County
Leelanau County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Macomb County
Marquette County
Menominee County
Missaukee County
Montcalm County
Montmorency County
Ontonagon County
Oscoda County
Presque Isle County
Schoolcraft County
St. Clair County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 11, 2017. http://www.michiganflora.net/species.aspx?id=928.