Pellaea atropurpurea (L.) Link
Common Name: PURPLE CLIFF-BRAKE
Coefficient of Conservatism: 10
Coefficient of Wetness: 5
Wetness Index: UPL
Physiognomy: Nt Fern
Status: T
Pellaea atropurpurea A. A. Reznicek

Rocky ledges, crevices in limestone pavement, low cliffs, and talus slopes. Usually not on exposed vertical cliffs; that habitat more typical of P. glabella.

Long known from the western Upper Peninsula, especially on the Keweenaw Peninsula; first reported from the eastern Upper Peninsula (Drummond Island) by Weatherbee (1990), this eastern population being perhaps more or less contiguous with populations on Manitoulin Island and the northern Bruce Peninsula of Ontario. 

Locations

Chippewa County
    Only on Drummond Island
Dickinson County
Keweenaw County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 18, 2017. http://www.michiganflora.net/species.aspx?id=9.