Rhizome short-creeping to erect. Fronds dimorphic, 43-135 cm long, 13-43 cm wide. Stipe 22-70 cm long, dark brown to reddish brown at base, often stramineous above; scales lanceolate, acuminate, entire or sometimes with marginal outgrowths, brown to reddish brown, sometimes bicolorous; lanuginose hairs also present. Lamina lanceolate to ovate, pinnate, with up to 29 pairs of pinnae; rachis and costae brown, reddish brown to stramineous; larger scales lanceolate, acuminate, reddish brown, mostly entire; fine matted scales and lanuginose hairs often present; papillae sometimes present especially near the groove; sterile pinnae narrowly ovate to linear-oblong, 7-27 cm long, 12-23 mm wide, shortly stalked at base of lamina, basiscopically adnate at apex; margins crenate and serrate; basal pinnae similar or slightly shorter; fertile pinnae linear, 10-21 cm long, 3-4 mm wide. Spores 59 × 43 µm; perine alate-costate; muri with ciliate margins; exine scaberulous.
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