Rhizome without the scales 2-3.8 mm diam., white waxy under the scales. Scales red-brown, without pale border, narrowed evenly towards the apex, not or seldom curling backward, bearing multiseptate hairs at least when young, peltate, 7-9 by 1.5-2.5 mm. Stipes pale or dark brown, adaxially grooved, 2-13 cm long, bearing hairs and/or scales when young, or glabrous, or with few scales. Lamina compound, tripinnate towards the base and in the middle part, deltoid and broadest towards the base, bearing multicellular hairs, 8-23 by 5-14 cm, leaf not or slightly dimorphous. Longest petiolules 1-3 mm long. Pinnae deltoid. Longest pinnae 2.5-8 by 1.5-4.5 cm. Pinnules of at least the larger pinnae anadromous, linear oblong. Longest pinnules 10-30 by 3-10 mm. Ultimate leaflets linear oblong, lobed almost to the midrib. Ultimate segments or lobes acute and usually ending in a tooth, 0.5-4 by 0.3-1 mm. Upper ridge at the junction of the costa and pinna-rachis with a swollen lip. Leaf axes, at least rachises, hairy. Veins in sterile ultimate lobes simple or forked, reaching the margin. False veins absent. Sori separate, frequently single on a segment, at the forking point of veins. Indusium also attached along the sides, pouch-shaped, oblong, longer than wide, 1-1.5 by 0.5 mm, upper margin elongated, free, extending to lamina margin or not. Lamina generally extending into a tooth at both sides of a sorus.
Home