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Rhizome c. 1 cm thick, deciduous-scaly. Scales 2.5-12 mm long, 0.4-1.5 mm wide, gradually tapering from base to acute apex, reddish brown; margins pale brown, bearing fine cilia. Nest fronds narrowly ovate to ovate, 4-39 cm or more long, 3.5-14 cm wide, shallowly or deeply lobed; lobes rounded. Foliage fronds 20-120 (-200) cm long; stipe 5-41 cm long, bearing small lobes spaced similarly to the pinnae. Lamina narrowly ovate, 1-pinnate; pinnae linear, 4-25 cm long, 0.4-3 cm wide, chartaceous to ±coriaceous, with a short narrowly winged stalk; base cuneate; margins shallowly incised (1 incision between each pair of main lateral veins); apex acuminate, acute; costular nectary on basiscopic margin of stalk. Sori round, 1-2 mm diam., in 1 row on each side of the costa; 1 sorus between each pair of main lateral veins, closer to the costa than the margin, impressed into the laminal surface, producing small rounded protuberances on the upper surface. Spores 37.5-57.5 µm long, 15-35 µm wide.
Rhizome shortly creeping, 1-2 cm in diam.; scales brown to dark brown, with a lighter margin, spreading, peltate, 5-13 × 0.5-1.5 mm, margin ciliate, apex acute to acuminate; fronds dimorphic, rachises persistent; basal fronds 10-30 × 5-15 cm, lobed from 1/3-4/5, margin irregularly and finely denticulate; foliage fronds stalked, stipe up to 40 cm, not winged, with 2 rows of nectaries; lamina pinnate, 25-100(-200) × 12-50 cm, apex aborted; pinnae articulate to rachis, all equally long or smaller toward apex, 8-25(-30) × 0.5-1.5 cm, base narrowly cuneate, margin crenate to serrate, apex obtuse to acuminate, free veinlets simple or absent, hydathodes absent. Sori in 1 row between costa and margin, costal, single between veins, orbicular, sunken. Spores with short, blunt spines and globules.
A very large fern. It usually grows attached to other plants. It grows 0.3-1.5 m tall. The rootstock is thick and fleshy. The nest leaves are short, narrow and deeply lobed. The sterile fronds are 10-36 cm long by 5-10 cm wide. They are sword shaped. The fertile fronds are very long and have leaflets along the stalk. The fronds are 0.3-1.5 cm long and erect or arching. The segments are 5-20 cm long and narrowly sword shaped. There are small teeth along the edge. The spore bodies are round and in a single row.
