The fern's bright green fronds are 30–120 cm (12–47 in) long, usually drooping downslope, with typically four to ten fronds on a mature plant. The fronds are soft-textured, bipinnate (single-pinnate on small, young plants), with the pinnae opposite on the stalk. Each pinna is 4–14 cm (2–6 in) long, with a large upward-pointing pinnule at the base, and the other pinnules decreasing in size toward the pinna tip; the pinnules have softly bristly tips. Individual fronds remain lush and fresh-looking throughout the season. They live for nine to fifteen months and remain attached to the rhizome after withering. The round sori occupy two rows on either side of the midrib of each pinnule and are covered by a centrally-attached, umbrella-like indusium with fringed edges. They produce light yellow spores.