Caudex short, erect, its apex covered with stiff brown scales 15 × 1.5 mm; fronds of young plants 3-5-lobed, of older ones with a trilobed apical lamina and a pair of bilobed acuminate pinnae, all lobes entire; fronds of mature plants with stipe to 70 cm long and lamina to 50 cm long, stipe and rachis dark brown and bearing short erect hairs; pinnae to 7 pairs; basal pinnae commonly to 18 cm long, stalked (stalk 2 cm), deeply lobed on the basiscopic side, with basal lobe to 12 cm long, shallowly lobed on acroscopic side; middle pinnae with ± sinuous margins or irregularly lobed on the largest fronds; main veins in pinnae 8-10 mm apart, smaller veins anastomosing between them with many excurrent free veinlets in the areoles; sori small, mostly at the ends of short veinlets in areoles, when very young having (at least in some cases) small reniform indusia but later appearing exindusiate; tetraploid (Manton in Holttum 1955).
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