Rhizome short, ascending, clad in dark brown linear-subulate attenuate paleae, c. 3-4 mm. long, us. with small tuber-like expansions; stipites tufted to clustered. Stipes slender to filiform, very dark brown, glab. except at paleate base. Rhachis filiform, glab., ± flexuous, bearing simple pinnae or 1-4 secondary pinnae in lower portion. Lamina rather dark green, delicate, flaccid. bearing sparse minute stiff hairs, to glab., narrow- to ovate-oblong. Lateral pinnae (1-4, if present) 4-15 × 1-2 cm., stalked, narrow-oblong. Terminal or sole pinna up to 13 × 2.5 cm., oblong to ovate-oblong. Pinnules dimidiate-oblong, stalked, sparingly setulose, up to 15 × 8 mm.; lower margin entire, straight or slightly curved; upper with numerous lobes or teeth. Sporangia in sinuses of lobes, protected by reflexed pale to dark brown, lunulate margin; 4-8 groups per pinnule.

n = 116

Rhizomes short, erect, scaly; rootlets bearing small tubers. Stipes and rachises glabrous except at very base. Laminae either 1-pinnate with 5-16 undivided pinnae on each side of rachis, or 2-pinnate with 1-(2) pairs of primary pinnae bearing secondary pinnae and a terminal portion with 12-25 undivided primary pinnae on each side; 1-pinnate fronds 5-10 × 1.5-3 cm, narrowly triangular; 2-pinnate fronds 8-20 × 4-18 cm, 3-fid. Ultimate pinnules ± oblong or parallelogrammoid, tending to curve basiscopically, 5-20 × 4-10 mm; stalk attached at proximal corner; upper and outer margins regularly lobed, inner and lower margins entire; upper surface glabrous, lower hairy or glabrous, both dark green. Indusia ± reniform with prominent sinuses, hairy or glabrous, up to 8 per pinnule on upper and outer margins.