Plants 40-80 cm tall. Rhizome erect, densely covered with lanceolate brown scales. Stipe stramineous, 16-50 cm, 3-5 mm in diam. at base, lower portion densely scaly; scales brown, often blackish brown at middle with a pale brown edge, ovate or lanceolate, margins fimbriate. Lamina ovate-lanceolate, 34-55 × 12-20 cm, base not contracted or sometimes slightly wider, 1-imparipinnate, apex acuminate; rachis with lanceolate or linear brown scales, fugacious. Lateral pinnae 7-10 pairs, alternate, ascendant, shortly stalked, lanceolate, sometimes falcate, pinnae below middle part 9-15 × 2-3.5 cm, base slightly obliquely broadly cuneate, margins entire or sometimes repand, apex acuminate or caudate, sometimes basalmost pair wider; terminal pinna lanceolate, margins repand, sometimes lower portion lobed, 9-10 × 2.5-3.5 cm; leathery, glabrous on both surfaces; venation pinnate, slightly raised abaxially, indistinct adaxially, veinlets anastomosing to form 3-7 rows of areoles. Sori throughout adaxial surface of pinnae; indusia margins entire. 2n = 164.
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