Rhizome elongate, sparingly branched, up to 1 m. or more long, c. 2 mm. diam., densely clad in brown subulate-attenuate paleae; stipites distant. Stipes 2-6 cm. long, pale brown, ± clad, especially towards base, in subulate paleae; rhachis us. with scattered paleae. Lamina 10-25-(60) × 5-10-(15) cm., membr. to subcoriac., dark green, ovate-to lanceolate-oblong. Pinnae 3-8 cm × 5-10 mm., patent, stipitate distant, alt., narrow-lanceolate, us. acuminate; margins crenulate to almost entire (sterile and poorly fertile pinnae often ovate-oblong, obtuse); veins free, forked. Sori on acrostichal forks, in a single row on each side of costa and near to margin, c. 1-1·5 mm. diam., up to 40 per pinna; sori sts coalescent, occ. a few scattered sporangia present. Indusium absent or vestigial.

n = c. 42