Equisetum telmateia Ehrh.
Coefficient of Conservatism: 10
Coefficient of Wetness: -5
Wetness Index: OBL
Physiognomy: Nt Fern Al
Status: X
Equisetum telmateia 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. Unlike his records based on specimen mix-ups, Farwell (1904) provides some detail about the occurrence: "I know of but one place where it is to be found. This is in an alder thicket and the ground is generally moist and of a rich muck"

A striking disjunct from western North America, isolated in the Great Lakes region and not seen since last collected by Farwell.


Keweenaw 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=1205.