Rhizome much branched, hollow, 1.5-2.5 cm thick, covered with scattered scales and simple or sometimes branched glandular hairs. Rhizome scales small, dark, dentate. Phyllopods hollow, prominent, 1-1.5 cm high, sometimes replaced by solid spines. Fronds monomorphic, stalked, deeply pinnatifid to the rachis; stipe 7-10 cm long, 2-5 mm thick, glabrous; lamina 20-40 by 4-6 cm, decurrent on the stipe, bright green, chartaceous. Pinnae obovate, 0.7-1 cm wide, narrowed at their base, equally wide to near apex, apex rounded to acute. Venation with recurrent free veinlets. Sori round, 2-3 mm diam., deeply immersed in orbicular cup-shaped reflexed marginal involucres, 12-15 on each pinna. Sporangia c. 0.3 mm long; on stalks to 0.5 mm long.
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