Rhizome long-creeping. Fronds dimorphic, 30-64 cm long, 12-30 cm wide. Stipe 2-12 cm long (below dentately lobed wing), brown, glabrous or with slender acuminate entire or finely dentate brown reddish brown or bicolorous scales and multicellular hairs. Lamina ovate, deeply pinnatifid, with 12-50 pairs of pinnules; rachis and costae greenish above, brown below, glabrous or with some scales and hairs; sterile pinnules linear-lanceolate, 6-15 cm long, 7-20 mm wide, acuminate, coarsely serrate to almost lobed, joining at rachis abruptly to a broad serrate wing of tissue which extends below basal pinnules; veins anastomosing; basal pinnules shorter; fertile pinnules linear, with sterile tissue at base continuous with wing of tissue of rachis. Spores 35 × 23 µm, verrucose and minutely vermiculate to scaberulous.
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