Stipe 16-24 cm long, very dark at base, paler upwards, covered with hairs 0.3 mm long; scales 3 x 1 mm, thin. Lamina to 30 cm long, thin; pinnae 15-18 pairs; lowest pinnae not or little shorter than next, 1.8 cm wide, with acroscopic basal lobe free and strongly dentate. Suprabasal pinnae to 6.5x1.5 cm, with winged stalk long; apex acuminate, lobes almost all dentate and separated by distinct sinuses; costules 3.5 mm apart; veins 6 pairs; rachis and costae beneath covered with hairs 0.2 mm long, costae bearing also subsessile glandular hairs and narrow scales, rest of lower surface glabrous; upper surface of rachis with hairs 0.5 mm long, those on costae 0.2 mm long. Sori medial, upper ones always athyrioid; indusia thin, glabrous.
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