Vermont Wood Fern is the hybrid between Marginal
Wood Fern and Male Fern. It is intermediate
between them in a number of characteristics, e.g.
placement, number of pinnae per frond,
number of pinnules per pinnae, and blade shape. As
is the case with many hybrids, in a mixed
poplulation they may be larger than either parent.
We found the sinuses between pinnules much larger
than in Male Fern, an easy identification tool.