Trunk 1–3 m tall, 3.5–5 cm diameter, bearing persistent stipe bases, but these eventually deciduous. Fronds 1.5–2.5 m long; stipes 12–33 cm long, bearing near base of stipe 2 to many small 3–4-pinnate, flaccid and skeletonised or partly skeletonised reduced pinnae, 5–17 cm long, occasionally above these 1 or 2 reduced but more normal pinnae with obvious lamina. Lamina bipinnate, 1.6–2.2 m long, ± 0.6 m wide; largest pinnae 24–48 cm long; largest pinnules 5–9 cm long by 1–2.2 cm wide; basal 1 to 2 pairs of lobes free, sometimes minutely stalked, the remaining costules also 4–5 cm apart, but connected by a narrow green wing; basal lobes lobulate half way to the costule, the remainder gradually less deeply cut to crenate; veins 5–7 pairs, forked once or twice. Scales on lower surface of pinnules; on lower surface of costae near base reddish brown, narrow, to 2 mm long, grading into smaller, more scattered, brown, bullate-lanceolate scales, costules commonly with bullate scales, veins with scattered appressed hairs. Sori at the forks of veins, exindusiate; paraphyses slender, as long as the sporangia. Fig. 2: 4, 4A, B (page 10).
