Rhizome much branched, hollow, 2.5-3.5 cm thick, forming a compact clump to 50 cm across enclosing branches of trees, covered with simple or branched glandular hairs and scattered scales mainly near apices. Rhizome scales brown, deeply dentate. Phyllopods hollow, prominent, 1-1.5 cm high, sometimes replaced by solid spines 2-3 mm long. Fronds monomorphic, stalked, deeply pinnatifid; stipe 10-20 cm long, 3-5 mm thick; lamina 30-85 by 6-18 cm, decurrent on the stipe, mid green, chartaceous. Pinnae perpendicular to the rachis to ascending, sterile 1-2 cm wide, fertile 0.6-1.2 cm wide, apex rounded. Venation with recurrent free veinlets. Sori round, 1.5-3 mm diam., immersed in conduplicate marginal teeth, 10-30 on each pinna. Sporangia 0.3-0.5 mm long, on stalks to c. 0.5 mm long; spores 64, to 70 µm long.
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