Cystopteris tennesseensis is similar to C. bulbifera
from which it differs in having only a few scattered glandular
hairs, in having few or no bulblets, and in lacking red stipes
in young plants. It is also similar to C. laurentiana.
See steps 60-64 in the key for assistance in identifying these
species, or refer to the Flora of North America, Vol. 2 for a
more thorough treatment.
Cystopteris tennesseensis is known from Wisconsin to Pennsylvania
and south to Oklahoma and Tennessee. It is rare in Wisconsin,
in the southwestern counties and a few other scattered localilties.
Its habitat is most often calcareous cliffs.