Cystopteris tenuis (Michx.) Desv.
Common Name: FRAGILE FERN
Coefficient of Conservatism: 5
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt Fern

Deciduous or mixed conifer-hardwood forests, usually on hummocks and banks; also on mossy shaded rock outcrops and ledges. Our commonest fragile fern.

Occurring in clumps and patches, but not forming extensive colonies on the forest floor like Cystopteris protrusa.

Locations

Alger County
Allegan County
Alpena County
Arenac County
Berrien County
Cheboygan County
Chippewa County
    Including Drummond Island
Clinton County
Delta County
Dickinson County
Eaton County
Emmet County
Genesee County
Gogebic County
Gratiot County
Hillsdale County
Houghton County
Huron County
Ingham County
Ionia County
Iron County
Jackson County
Kent County
Keweenaw County
    Including Isle Royale
Lapeer County
Leelanau County
    Including Manitou Islands
Lenawee County
Livingston County
Luce County
Mackinac County
Macomb County
Marquette County
Mason County
Muskegon County
Oakland County
Ontonagon County
Otsego County
Ottawa County
Saginaw County
Schoolcraft County
Shiawassee County
St. Clair County
Tuscola County
Van Buren County
Washtenaw County
Wayne County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 12, 2017. http://www.michiganflora.net/species.aspx?id=525.