life
cycle – perennial,
reproducing by spores and brown-black, scaly rhizomes
stems – leaf
stalk (not true stem) arise from rhizomes, upright, smooth,
red to maroon or green, grooved, green becoming brown late
season growth habit, leaf stalks
leaves – fronds
divided into 3 parts (one terminal, two opposite), triangular,
held nearly horizontally, dark green, course, each of 3 parts
bipinnately subdivided, spore-producing structures formed along
the underside edge of leaflets, spores partially or completely
covered by inrolled leaf margins leaves