Dryopteris expansa (Presl) Fraser-Jenkins & Jermy
Common Name: EXPANDED WOODFERN
Coefficient of Conservatism: 9
Coefficient of Wetness: 0
Wetness Index: FAC
Physiognomy: Nt Fern

Northern hardwood or mixed conifer-hardwood forests, usually on slopes and in ravines.

The very long and broad lower pinnules near the rachis make the lowest pinnae of this plant quite asymmetric compared with either D. carthusiana or D. intermedia. An evidently very rare glandular form has been collected twice; it is morphologically typical of D. expansa so apparently not of hybrid origin.

Locations

Baraga County
Gogebic County
Keweenaw County
    Including Isle Royale
Mackinac County
Marquette County
Ontonagon County

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. December 11, 2017. http://www.michiganflora.net/species.aspx?id=1183.