Rhizome 1-2 cm in diam., with many old persistent stipes, creeping; scales soft, tufted, basifixed, 4-11 × 0.5-1.5 mm, base auriculate, margin biserrate; fronds dimorphic, or sometimes basal fronds absent; basal fronds sessile or with very short stipe, oblong-lanceolate, 5-15 × 3-6 cm, base narrowed, not cordate, not auriculate, pinnatilobed up to 2/3 or more, lobes 10-12(-20) pairs, margin slightly dentate; foliage fronds stalked, stipe 2-10 cm, conspicuously winged; lamina pinnatifid, 22-50 × 7-12 cm, apex often aborted; pinnae 16-25(-30) pairs, spreading, lanceolate, 4-7 × 0.5-1.2 cm, margin dentate, glabrous or sparsely ciliate, apex acute; lamina sparsely hairy on both surfaces, especially along costa and veins. Sori in 1 straight row between costa and margin, close to costa, 1 row between lateral veins. Spores verrucate and with spines.
