Caudex up to 10 m. tall with basal diam. 45 cm., us. smaller; bases of stipites long-persistent. Stipes rather stout, ± 4 cm. diam. near base; paleae shining dark brown, c. 5 cm. long; hairs yellow-brown, cop., deciduous. Lamina up to 3 × 1 m. or more, 2-3-pinnate; subcoriac., attenuate; dark green above. Juvenile plants with lamina pale green below; subsequent fronds becoming patched with white to glaucous bloom below; adult plants with lamina almost completely white or glaucous below. Primary pinnae 30-50 cm. long, oblong-acuminate; secondary up to 10 cm. or more, oblong-lanceolate, attenuate. Tertiary pinnae or segs up to 15 mm. long, subfalcate, subacute to acute, crenate-serrate in upper half, margins slightly recurved, veinlets free. Sori us. cop., globose, c. 1 mm. diam. (may be present on only partly dealbate fronds). Indusium thin, at first covering sorus, persisting as a shallow cup.