Rhizome without the scales 2.5-3 mm diam., not white waxy. Scales nearly black, without pale border, distinctly acicular, often curling backward, not bearing multiseptate hairs, with marginal setae at least in distal part, peltate, 6-10 by 2 mm. Stipes dark brown, adaxially grooved, 4-9 cm long, glabrous or with few scales. Lamina compound, tripinnate or quadripinnate towards the base and in the middle part, deltoid and broadest towards the base, glabrous, 7-14 by 6-14 cm. Longest petiolules 1-7 mm long. Pinnae linear-triangular. Longest pinnae 4-7 by 2-7 cm. Pinnules of at least the larger pinnae anadromous, linear oblong, or narrowly ovate. Longest pinnules 15-25 by 7-12 mm. Ultimate leaflets linear oblong, lobed almost to the midrib. Ultimate segments or lobes obtuse or acute without a tooth, 1-2 mm long (up to 4 mm in sterile leaves), 1-2 mm broad. Upper ridge at the junction of the costa and pinna-rachis not swollen. Margins of the lamina of each leaflet not thickened. Veins in sterile ultimate lobes frequently simple, not reaching the margin. False veins not present. Sori separate, frequently single on a segment, at the forking point of veins. Indusium attached at the base and only part of the sides, semicircular, about as wide as long, c. 1 mm. Lamina not extending into teeth beyond a sorus.
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