Cyperus schweinitzii Torr.
Common Name: ROUGH SAND SEDGE
Coefficient of Conservatism: 5
Coefficient of Wetness: 3
Wetness Index: FACU
Physiognomy: Nt P-Sedge

Cyperus schweinitzii A. A. Reznicek

Dunes, dry prairies, fields, and roadsides.

Occasional specimens with smoothish culm or smaller achenes and scales than usual appear to approach C. houghtonii, but in each case all other characters point to C. schweinitzii. Specimens from the vicinity of Caseville, Huron Co., however, come close to C. houghtonii. Quite probably a hybrid complex is involved here, for other specimens from Huron Co. appear somewhat intermediate between C. lupulinus and C. houghtonii.

Locations

Allegan County
Alpena County
Benzie County
Berrien County
Calhoun County
Cass County
Chippewa County
    Only on Drummond Island
Crawford County
Delta County
Grand Traverse County
Huron County
Kalamazoo County
Kent County
Leelanau County
    Including Manitou Islands
Lenawee County
Manistee County
Mason County
Menominee County
Monroe County
Muskegon County
Newaygo County
Oceana County
Osceola County
Ottawa County
Schoolcraft County
Tuscola County
Van Buren County
Wexford County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 13, 2017. http://michiganflora.net/species.aspx?id=1096.