Rhizome up to 6 mm. in diam., short, creeping, with tufted fronds and with narrowly attenuate entire rhizome-scales up to 5 mm. long, some concolorous pale-brown mixed with others with a black central stripe and pale margins. Stipe castaneous, up to 40 cm. long, glabrous, shallowly channelled on the ventral surface. Frond erect to arching, thinly coriaceous. Lamina up to 58 x 40 cm., triangular in outline, mostly 4-pinnatifid (3-pinnate in juvenile fronds) to 4-pinnate with the lowest pinnae well developed basiscopically; ultimate segments 1–2 cm. long, oblong, subacute to acute, pinnatifid with oblong to triangular lobes, subentire when fertile, evidently crenate when sterile, both surfaces glabrous; venation free, evident; rhachis and secondary rhachises castaneous, glabrous, channelled on the ventral surface. Sori forming a marginal soral line; indusium continuous, sub-entire, membranous.