Rhizome stout, erect or ascending, invested by bases of fallen stipites, clad in dark brown linear-attenuate paleae c. 15 mm. long; stipites tufted. Stipes stout, blackish, smooth, 5-10 cm. long, ± paleate at base or throughout. Rhachis stout, smooth, deeply grooved, bearing numerous close-set pinnae. Sterile lamina subcoriac., dark to light green, lanceolate-oblong, acuminate, 30-90 × 7-15 cm. Lower pinnae reduced to lobules; larger pinnae 4-8 cm. × 8-15 mm., oblong-lanceolate, acute to acuminate, straight to subfalcate, attached by widened base, sinuate to crenulate; veinlets mostly forked. Fertile lamina 20-50 cm. long, pinnae linear, slender to almost filiform, arcuate, 3-8 cm. long. Sori covering whole of undersurface and us. obscuring costa.

2n = c. 66