Plants 50-80 cm tall. Rhizome erect, short, stout; scales of rhizome and lower part of stipe dense, brownish black, lanceolate, serrulate. Fronds caespitose; stipe stramineous, 18-35 cm, sparsely scaly from middle part of stipe to rachis; scales brownish black, subulate-lanceolate, crenulate; lamina oblong or deltoid-ovate, 25-45 × 15-25 cm, once pinnate, base not or slightly gradually narrowed, apex acuminate; pinnae 10-16 pairs, lanceolate or oblong-lanceolate, 10-12 × 1.5-3 cm, base rounded-truncate, shortly stalked or subsessile, margin spreading sinuate-crenate, apex acuminate. Lamina herbaceous, glabrous adaxially, with 1 or 2 fibrillose scales on costa and veinlets abaxially, with brownish black or brown, linear, crenulate scales along abaxial side of rachis; veins slightly visible, lateral veins pinnate-forked, 3-7 in pinnate groups. Sori below middle of veinlets, in 2 or 3(or 4) irregular rows on both sides of costa, exindusiate.