Coefficient of Conservatism:
Coefficient of Wetness:
Nt Fern Al
M. R. Penskar
Collected twice by O. A. Farwell (BLH, GH); vegetative stems on August 25, 1890 and fertile stems June 1, 1895, in alder thickets on the Keweenaw Peninsula (Keweenaw Co.). The BLH collections have no specific locality, but the GH specimens note "N. W. Cliff Mine."
Drife & Drife (1990) cautiously accept this record based on a preponderance of evidence that no specimen mix-ups occurred with these collections.
A striking disjunct from western North America, isolated in the Great Lakes region and not seen since last collected by Farwell.