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Rhizome filiform, with or without sparse hairs; stipites rather distant to approximate. Stipes filiform, 1-4 cm. long, not winged, with a few hairs at base when young. Rhachis filiform narrowly winged in upper part. Lamina 2-8 cm. long, narrow-oblong, rather dark green, pinnate to pinnatifid; segs developed on abaxial side of pinnae, linear, coarsely toothed. Sori on short lateral segs near base of abaxial side of pinnae, free or nearly so. Indusium c. 1·5 mm. long, broadly oblong, deeply 2-valved; valves with entire to minutely crenulate margins. Receptacle included.
Rhizome creeping. Fronds borne 5-50 mm apart; stipe filiform, narrowly winged for part of its length; lamina narrowly oblong to linear with lowest pinnae usually reduced, 10-180 mm long and up to 15 mm broad; pinnae glabrous, bifid to unilaterally pinnatifid on acroscopic side forming up to 6 linear-oblong serrate lobes up to 1.5 mm broad with rounded apices; rhachis narrowly winged. Sori usually on basal acroscopic segments of pinnae, with ovate rounded entire indusial valves c. 1.5 mm broad, lamina around sorus reduced or absent.
Rhizome widely creeping, irregularly branched, up to 0.1 mm in diam., with scattered simple hairs. Fronds spaced, up to 110 mm long. Stipe glabrous or with few simple hairs. Lamina linear, 2-pinnatifid to 2-pinnate, up to 180 mm long, unequally pinnatifid acroscopically, lobes serrate. Sori on proximal acroscopic segments with entire indusial valves.
Perennial with branched rhizome. Fronds 2-pinnatifid to 2-pinnate, stipe partially narrowly winged, lamina to 18 cm long, unequally pinnatifid acroscopically, lobes serrate. Null Sori on proximal acroscopic segments with entire indusial valves.
