Fronds dimorphous. Sterile frond: stipe to 47 cm long, mid-castaneous, very sparsely hairy, basal scales to 15 × 2 mm, firm, castaneous with paler fragile margins, those above base of stipe very narrow; lamina to 55 cm long, apex pinna-like, to 27 × 8 cm with short decurrent base or a little united with an uppermost pinna; pinnae to 4 pairs; uppermost pinnae to 24 × 4.5 cm, narrowed to cuneate bases with a bud at the base of each, apex abruptly short-acuminate; basal pinnae unlobed, to 21 × 8 cm, narrowly cuneate at their bases with stalks 5-7 mm long; main veins 10-15 mm apart along costae, smaller veins very slender and not prominent but distinct on lower surface; surfaces glabrous except for sparse hairs near bases of upper surface of costae. Fertile frond: lamina to 32 cm long, its apical section sometimes trilobed; basal pinnae to 15 × 3.5 cm; sori small, irregularly arranged, very irregular in shape and sometimes confluent, mostly on free veinlets in areoles, small indusia sometimes present, hidden by mature sporangia.
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