Rhizome 4-6 mm thick, internodes to 2.5 cm long; vascular strands with bundle sheath hyaline to fully sclerified; sclerenchyma strands many. Rhizome scales peltate, spreading, 9-17 by 1.5-2.2 mm, acute, brown to blackish, thick, shining, brittle, evenly coloured, entire. Fronds pinnatifid, monomorphic. Stipe 5.5-27 cm long; lamina 20-40 cm long, pinnae in 2-11 pairs, connected by a 0.2-0.4 cm wide strip; at least upper pinnae, and often also basal pinnae ascending at 45°, apical segment conspicuous, long, often the only segment fertile; largest fertile lateral pinna is 2nd to 4th from base, blade 10-19.5 by 0.9-1.5 cm, widest at 2-6 cm from base (often tapering from near pinna-base). Venation: main veins on upper surface not raised (rarely raised), distinct. Hydathodes frequent, calcareous scales not persistent. Margin cartilaginous, thickened to strongly thickened; notches sporadically to regularly present. Sori round, in one row between adjacent veins, in one row between costa and margin, at 1.5-3 mm from costa, 3 mm wide, superficial.
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