Plants evergreen. Rhizome erect or ascending, short, densely covered with linear brown scales. Fronds up to 80 cm; stipe yellowish brown, 16-39 cm, 2-4 mm in diam. at base, densely covered with linear, lanceolate and larger scales; large scales bicolorous, blackish brown at middle, shiny, ovate, ovate-lanceolate, and broadly lanceolate, up to 12 × 6 mm, subentire, caudate. Lamina bipinnate, oblong or elliptic-lanceolate, 30-60 cm, middle part 13-22 cm wide, base slightly or not contracted, lower part sterile, apex acuminate or slightly acute, fertile or sometimes apical tip sterile; rachis without proliferous bulbils, abaxially densely covered with linear, lanceolate and larger scales; large scales bicolorous, blackish brown at middle, shiny, ovate-lanceolate or broadly lanceolate, up to 7 × 2.2 mm, irregularly serrulate, caudate. Pinnae 14-21 pairs, alternate, attached at right angles to rachis, shortly stalked, lanceolate, not contracted toward base, bases asymmetrical, apices acuminate or caudate; middle pinnae 5-11 × 1.4-2.6 cm, 1-pinnate; costa abaxially covered with linear brown scales. Pinnules 10-18 pairs, alternate, shortly stalked, deltoid-ovate, 1-1.7 cm × 5-7 mm, bases cuneate, with rounded auricles acroscopically, apices acute, margins coarsely toothed to shallowly lobed or deeply lobed, teeth obviously spinulose at tip; basal acroscopic pinnules largest, deeply incised to pinnatipartite; abaxially sparsely covered with shortly filiform microscales, adaxially subglabrous; frond texture papery; venation pinnate, lateral veins 5-7 pairs, dichotomous, distinct. Sori 4-6 pairs per pinnule, in 1 row on each side of midrib, slightly close to midrib, terminal on veinlets; indusia present, irregularly toothed. 2n = 164.
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