Roots not proliferous. Stems erect or ascending, unbranched; scales black throughout, narrowly deltate, 2--3 × 0.2--0.3 mm, margins mostly with widely spaced, shallow teeth. Leaves monomorphic. Petiole dark reddish brown throughout, dull, 1--3 cm, 1/10--1/6 length of blade; indument of black filiform scales. Blade lanceolate, 2-pinnate to 2-pinnate-pinnatifid, 4--10 × 1--3 cm, thin, sparsely pubescent; base tapering; apex acute to acuminate, often bearing minute, scaly, proliferous bud. Rachis basally reddish brown, fading to green in distal 1/2 to 3/4, dull, sparsely pubescent and with a few filiform scales. Pinnae 10--20 pairs, narrow, oblong; medial pinnae 5--12 × 4--7 mm; base acute to obtuse; margins coarsely incised; apex notched, bearing proliferous bud. Veins free, obscure. Sori 1--4 pairs per pinna, on both basiscopic and acroscopic sides. Spores 64 per sporangium. 2 n = 72.
