Rhizomes short, erect, apex densely clothed with dark brown, lanceolate or narrowly lanceolate scales. Fronds caespitose; fertile fronds 50-75 cm; stipe dark brown at base, upward stramineous, 22-23 cm, 1.2-2 mm in diam., base similarly scaly, upward sparsely scaly, scales small or glabrate; lamina pinnate to 2-pinnate, oblong-lanceolate or broadly lanceolate, 30-56 × 7-26 cm, base gradually narrowed, apex long acuminate; pinnae 15-18 pairs, alternate, ascending or subspreading, slightly falcate, stalked (stalk 2.5-3 mm), 3 or 4 pairs of lower pinnae gradually shortened; basal pinnae narrowly ovate, 1.4-9 cm, pinnatifid; middle pinnae broadly lanceolate, somewhat falcate, 5-15 cm, base broadened, base inequilateral or subequilateral, subtruncate, auriculate, often overlapping rachis on acroscopic side, narrowly cuneate on basiscopic base, pinnate, apex long acuminate; pinnules 8-15 pairs, alternate, ascending or subspreading, subsessile; basal acroscopic pinnules largest, ovate-oblong, up to 1.3-2.5 × 0.6-1.2 cm, base equilateral, ± rounded, adnate to costa, or inequilateral, truncate, auriculate on acroscopic side, narrowly cuneate on basiscopic side, pinnatilobate to pinnatipartite, apex obtuse-acute or acute; pinnule segments 4-6 pairs, ascending, deltoid-oblong, subentire, apex obtuse or acute, with 3 or 4 crenations; upper pinnules reduced, 5-10 mm, usually decurrent and connate to wings of costa, sinuate or crenate at margin; veins somewhat visible adaxially, visible abaxially, pinnate in pinnules, lateral veins simple or forked. Lamina herbaceous or nearly papery when dried, glabrate, dark green adaxially, green abaxially; rachis and costae abaxially stramineous or slightly brownish, with sparse short hairs. Sori large, orbicular or rotund, 1 or 2 sori per segment, medial or inframedial; indusia large, mostly horseshoe-shaped or J-shaped, distal indusia pale brown, oblong, membranous, slightly ciliate or subentire at margin, persistent. Perispore hyaline, with few folds. 2n = 80, 160.
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