Plants ca. 80 cm tall. Rhizome erect. Fronds caespitose; stipes ca. 22 cm, ca. 7 mm in diam. at base; scales blackish brown, concolorous, shiny, ovate-lanceolate, often ca. 0.9 × 0.5 cm, membranous, margins nearly entire or ciliate, apex acute or acuminate; lamina elliptic-lanceolate, ca. 58 cm, ca. 18 cm wide at middle, bipinnate, below middle contracted toward base and sterile, acuminate and fertile at apex; rachis ca. 3 mm in diam. at middle; rachis scales dense, blackish brown, broadly lanceolate; pinnae 18-20 pairs, spreading, alternate, shortly stalked, lanceolate, 5-11 cm, 1.8-2.6 cm wide at middle, pinnate, asymmetrical at base, acuminate at apex; pinnules sessile, 10-14 pairs, oblong, 1-1.4 × 0.4-0.5 cm, fibrillose on both surfaces, asymmetrical at base, dentate on margin, obtuse at apex. Lamina herbaceous, veins 8-11 pairs per pinnule, pinnate, distinct abaxially; lateral veinlets forked. Sori in 1 row on each side of costa, brown, orbicular; indusia brown, reniform, membranous.
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