Rhizome much-branched, hollow throughout, 3-5 cm thick, densely covered with scales. Scales orbicular, 2-2.3 mm diam., with central cells with lumina concolorous with the immediate surrounding cells, forming a ferruginous centre, margin not glandular. Phyllopods solid, not prominent. Fronds dimorphic, stalked, deeply pinnatifid, fertile fronds more deeply than sterile ones; mid-green, coriaceous. Fertile fronds with stalks 10-28 cm long, 2-5 mm thick, lamina 30-60 by 10-20 cm, pinnae to 0.4 cm wide, linear. Sterile fronds with stalks 4-18 cm long, lamina 12-22 by 8-12 cm, pinnae obovate, 1-2 cm wide, base often narrowed, apex rounded. Venation with one row of areoles with branching recurrent included veinlets. Sori 2 mm diam., deeply immersed, in a single row on each side of the costa, forming papillae to 1 mm high on the abaxial surface, to 60 on each pinna. Sporangia c. 0.5 mm long; spores 64.
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