Rhizome ascending, 2-2.5 cm in diam., covered with scales at apex. Fronds caespitose. Stipes stramineous, 20-30 cm, 1-1.5 mm in diam., base dark brown and densely covered with scales; scales black or blackish brown, linear-lanceolate; scales upward smaller or subglabrous. Lamina deltoid-lanceolate, 30-35 × 20-25 cm, widest at base, bipinnate, with a somewhat caudate apex. Pinnae 5-7 pairs, broadly lanceolate; basal pinnae largest, up to 12-13 × 4-5 cm, stalked, other pinnae sessile. Pinnules distinct on lower part of lamina, usually 4-6 pairs on each pinna, oblong; pinnules on basiscopic side of lowest pinnae larger than those on acroscopic side, ca. 3 × 1 cm, truncate at base, pinnatifid, obtuse and toothed at apex. Veins pinnate; veinlets simple or forked, visible abaxially. Lamina herbaceous, dark green, glabrous adaxially, scaly abaxially; rachis subglabrous; pinna rachis and costa covered with bullate, brown scales. Sori orbicular, medial; indusia brown, reniform, entire.
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