Equisetum variegatum Schleich.
Common Name: VARIEGATED SCOURING RUSH
Coefficient of Conservatism: 6
Coefficient of Wetness: -3
Wetness Index: FACW
Physiognomy: Nt Fern Al

Wet calcareous meadows, both natural, as on wet shores, beaches, and interdunal settings, and artificial, as in borrow pits, roadside banks, and ditches.

This is a very uniform and narrow stemmed plant, often forming dense stands, but unfortunately, identification is complicated by the fact that it also commonly hybridizes with Equisetum hyemale (see below) and E. laevigatum (see discussion of E. ×nelsonii under E. laevigatum) and slender individuals of the hybrids can be difficult to distinguish.

Equisetum ×mackayi is a common hybrid of E. hyemale and E. variegatum, occurring on moist sandy shores and sand dunes of the Great Lakes and inland lakes, as well as stream banks, moist swales, and borrow pits. It was known as Equisetum ×trachyodon A. Br. in older literature.
 

 

Locations

Alger County
Allegan County
Alpena County
Antrim County
Baraga County
Bay County
Benzie County
Berrien County
Charlevoix County
    Including Beaver Island
Cheboygan County
Chippewa County
    Including Drummond Island
Clare County
Delta County
Emmet County
Gladwin County
Grand Traverse County
Hillsdale County
Houghton County
Huron County
Ionia County
Iosco County
Jackson County
Kalamazoo County
Kalkaska County
Keweenaw County
    Including Isle Royale
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Lenawee County
Mackinac County
    Including Bois Blanc, Mackinac, Round Islands
Manistee County
Mason County
Menominee County
Monroe County
Muskegon County
Oakland County
Osceola County
Oscoda County
Presque Isle County
Saginaw County
Schoolcraft County
St. Clair County
Tuscola 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 16, 2017. http://michiganflora.net/species.aspx?id=1206.