Dryopteris -Key to the Genus

A)

Fronds narrowly oblong for most of their length, up to 12 cm wide; pinnae mostly broadly triangular, the basal pinnae generally less than 1.7× as long as wide.

B)

Fronds triangular to ovate, proportionately wider, the blade usually 13-20 cm wide (occasionally to 25 cm), scarcely or not at all narrowed toward the base; pinnae widest at the base, tapering evenly rather than irregularly from the base to the apex .