Similar species: Oak Fern (Gymnocarpium dryopteris) - much smaller, grows in deep woods. Robert's Fern (Gymnocarpium robertianum) - much smaller, uncommon. Rattlesnake Fern (Botrypus virginianus) - much smaller, stouter for its size; has a central fertile frond sticking straight up.
PLEASE NOTE: A coloured Province or State means this species occurs somewhere in that Province/State.
The entire Province/State is coloured, regardless of where in that Province/State it occurs.
(Range map provided courtesy of the USDA website
and is displayed here in accordance with their
Policies)