Caudex short, erect; stipe to 28 cm long, sparsely minutely hairy, glabrescent and glossy, dark purplish brown; basal scales c. 10 × 1 mm, rigid, dark, persistent, narrower scales above base caducous; lamina to 25 cm long, rigid, consisting of a trilobed apex and 1 pair of pinnae; apical lamina to 20 cm long, its base rather narrowly decurrent, midlobe 3-4 cm wide, entire or with sinuous margins and narrowed to 2.5 cm wide at its base, lateral lobes to 10 × 1.2 cm, often unequal, their costae at 45° to the midlobe; pinnae 15 cm long with stalks to 7 mm long, somewhat dimorphous, sterile ones to 2.5 cm wide, fertile to 1.7 cm; each with a basiscopic lobe to 10 × 0.8-1.2 cm; main veins prominent on lower surface, other veins not prominent, distinct on young fronds only; lower surface glabrous, upper surface of costae and main veins sparsely hairy; sori small, irregularly scattered, exindusiate, many ± elongate along veins but others on free veinlets in areoles.
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