Rhizome 4-14 mm in diam., densely covered with scales, generally not white waxy. Scales red-brown, with pale border from base to apex, narrowed evenly toward apex or above much broader base evenly narrowed toward apex, not or seldom curling backward, peltate, 5-10 × 1-1.2 mm, with multiseptate hairs at least when young (hairs at least at apex of young scales, ca. 1 mm, woolly). Stipe pale, adaxially grooved, 9-35 cm, glabrous or with few scales; lamina compound, bipinnate or tripinnate toward base and in middle part, deltoid and broadest toward base, 15-90 × 21-40 cm, glabrous (sometimes with hairs at junction of rachis and petiolule), not or slightly dimorphic. Longest petiolules 5-25 mm; pinnae linear-triangular or narrowly ovate, apex acuminate; longest pinnae 11-28 × 6-15 cm; pinnules of at least larger pinnae anadromous, deltoid or rhombic; longest pinnules 40-100 × 15-80 mm; ultimate pinnae linear-oblong or rhombic, lobed almost to midrib, or only shallowly lobed (in bipinnate fronds: ultimate segments shallowly lobed); ultimate segments 10-40 × 3-17 mm. Rachises and costae glabrous (often hairs at junction of petiolules). Margins of each pinna not thickened. Veins in sterile ultimate lobes pinnate, reaching margin or not; false veins not present. Sori separate, borne several on a segment, at forking point of veins; indusium also attached along sides, pouch-shaped, oblong, longer than wide, 1.2-2 × 0.5-1 mm, upper margin not elongated, truncate or slightly rounded, separated from or even with lamina margin; lamina not extending into teeth beyond a sorus.