Rhizome without the scales 3-4 mm diam., white waxy under the scales. Scales red-brown, without pale border, narrowed evenly towards the apex, often curling backward, not bearing multiseptate hairs, with marginal setae at least in distal part, peltate, 4-5 by 0.5-1 mm. Stipes dark brown, adaxially grooved, 9-30 cm long, glabrous or with few scales. Lamina compound, bipinnate or tripinnate towards the base and in the middle part, deltoid and broadest towards the base, glabrous, 16-50 by 9-25 cm. Longest petiolules 2-4 mm long. Pinnae narrowly ovate. Longest pinnae 5-19 by 2-4.5 cm. Pinnules of at least the larger pinnae anadromous, linear oblong or narrowly ovate. Longest pinnules 12-25 by 3-10 mm. Ultimate leaflets linear oblong, lobed almost to the midrib, or only shallowly lobed. Ultimate segments or lobes obtuse or acute without a tooth, or acute and usually ending in a tooth, 0.5-7 by 1-2 mm. Upper ridge at the junction of the costa and pinna-rachis not swollen. Leaf axes glabrous. Margins of the lamina of each leaflet thickened and decurrent on the edge of the grooved rachis. Veins in sterile ultimate lobes pinnate, reaching the margin. False veins present. Sori separate, borne several on a segment, at the forking point of veins. Indusium attached at the base and only part of the sides, or also attached along the sides, pouch-shaped, more or less triangular to rhomboid or oblong, about as wide as long, c. 0.5 mm, upper margin not elongated, truncate or slightly rounded, extending to lamina margin or not. Lamina generally extending into a tooth at both sides or only at the outside of a sorus.
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