Plants terrestrial, 60-150 cm tall. Rhizome erect or suberect. Stipes clustered, densely scaly at base; scales deep stramineous to brown, dark brown, broadly lanceolate, 40-45 cm, ca. 1 cm in diam., membranous, with light brown articulate hairs, broadly winged nearly to base, entire, apices acuminate. Lamina odd-pinnatipartite, deep green when dried, oblong, 30-60 × 30-35 cm, thinly herbaceous, both surfaces glabrous; rachises and costae stramineous, glabrous adaxially, slightly pubescent abaxially; terminal lobe ovate-lanceolate, 25-30 × ca. 10 cm, base narrowed and decurrent to broad wings along entire rachis, apex acuminate, undulate to toothed, sessile; lateral lobes 1-4 pairs, homomorphic but smaller, opposite, oblique upward, sessile, without gemmae, broadly lanceolate, ca. 20 × 8 cm, bases narrowed and adnate to rachis, apices caudate, subentire or undulate, basal lobes lobed to form smaller lanceolate lobes. Veinlets forming conspicuous subhexagonal areoles, included veinlets forked, glabrous on both sides. Sori orbicular, on anastomosing veins, in irregular rows between lateral veins; indusia brown, orbicular, membranous, caducous.
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Caudex erect or suberect; stipe to 45 cm long, winged almost to its base, the wing to 10 mm wide on each side, near base densely scaly on ab-axial side, largest scales to 20 × 2 mm, very firm, very narrow scales present on adaxial side; lamina to 80 cm long, lobed to a wing on each side of the rachis (wing widest distally), lobes pinna-like, 1-6 pairs, largest 30 × 7 cm, entire, short-acuminate, the basal ones sometimes with a narrowly acuminate basiscopic lobe; veins amply anastomosing; lower surface of costae and main veins variably short-hairy, upper surface of costae glabrous or with sparse very short hairs; sori small, numerous, rather irregularly arranged on veins which surround areoles; indusia distinct, thin, ± reniform, their margins usually short-fringed when young.
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