Rhizome stout, erect, sts produced into a short caudex invested by bases of fallen stipites; clad in dark linear-subulate paleae c. 5-10 mm. long; stipites tufted. Stipes 2-5-(15) cm., stiff; ± paleate, becoming glab., dark towards base. Rhachis stout, deeply grooved, with numerous pinnae diminishing downwards to rounded lobes. Sterile lamina lanceolate-acuminate, submembr., bright green, 15-30-(45) × 4-6-(10) cm. Pinnae approximate, larger 2-5 cm. × 5-10 mm., oblong to lanceolate-oblong, acute to obtuse, subfalcate, sinuate-crenulate to crenate-serrate, attached by widened base; veinlets mostly forked. Fertile lamina 15-20 × 2-5 cm. Pinnae narrow linear, up to 4 cm. long, attached by widened base. Sori covering whole of undersurface.

2n = 66