The fronds of Thelypteris simulata are spread out along
a rhizome, and are therefore not conspicuously clumped, though
consectutive fronds may be only 1-2 cm apart. The blades are pinnate-pinnatifid
and 14-35 cm long. Sori are round with true indusia. Veins
in the blade segments are unbranched, in contrast to the very
similar T. palustris for which the veins are branched.
T. simulata ranges from Nova Scotia and Ontario to Virginia
and West Virginia. It is disjunct in Wisconsin where it is known
from 5 contiguous counties in the west central portion of the
state. It is listed as a special concern species in Wisconsin.
Habitat is usually wet forest on acid soils.