Polystichum lonchitis (L.) Roth
Coefficient of Conservatism: 10
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt Fern

Northern hardwood or mixed conifer-hardwood forests, usually over calcareous rock outcrops, usually on boulders or low, mossy ledges; very rarely on steep slopes in forests lacking exposed bedrock such as on forested dune slopes near Lake Michigan. Also occasional in more open areas in sites like deep crevices in sunny bedrock exposures.

Especially frequent in rocky woods on the Niagara Escarpment in the eastern Upper Peninsula.


Alger County
Baraga County
Chippewa County
Houghton County
Keweenaw County
Leelanau County
    Including Fox Islands
    Including Manitou Islands
Mackinac County
Marquette County
Ontonagon County
Schoolcraft County


MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. November 29, 2022. https://michiganflora.net/species.aspx?id=1191.