Caudex short, suberect; stipe to 60 cm long, nearly black, at first minutely hairy, glabrescent; basal scales firm, to 12 × 2 mm; lamina of young plants ovate, cordate, deeply lobed; of mature plants to 60 cm long, consisting of apical lamina and 1-3 pairs of pinnae; apical lamina to 25 cm long, deeply lobed, the lobes acuminate, lowest ones deeply lobulate, base short-decurrent; upper pinnae sessile, deeply lobed, lobes acuminate on large fronds; middle pinnae to 25 × 11 cm, their costules 2 cm or more apart, lobes acuminate, crenate; basal pinnae to 30 cm or more long, sometimes bearing 1 pair of stalked pinnules, basal basiscopic pinnule or lobe 15 cm long, shaped as upper pinnae; sparse short hairs present on lower surface of costae and veins, a few also between veins; hairs on upper surface of costae dense, short, between veins only near the margin; sori small, scattered irregularly, mainly on short free veins in areoles; indusia small, glabrous, subreniform; spores minutely spinulose.
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