Fern forming clumps with semi-erect fronds. Rhizome short-creeping, scaly. Stipe and rachis chocolate-brown, becoming green near apices, brittle, abundantly scaly; stipe 5–20 cm long, 1–2 mm diam., often proliferous below terminal pinna. Lamina 1-pinnate or sometimes 2-pinnate at base, narrowly ovate or rarely ovate, 20–40 cm long, 3.5–11 cm wide, dark green, sparsely scaly; veins conspicuous. Pinnae in 12–25 pairs, narrowly ovate or rarely ovate, often with an enlarged basal acroscopic lobe; bases unequally cuneate, shortly stalked; margins serrate or doubly and often deeply serrate; apices obtuse to acuminate; longest pinnae below middle, 2–6 cm long, 1.2–2 cm wide; lower pinnae divided partly or almost completely to the midrib into a single secondary pinna, gradually reducing upwards to an acuminate pinnatifid apical portion. Sori often slightly curved away from midrib, to 10 mm long. Perispores dark with smooth broad ridges and smooth lacunae; exospores 36.3–50 × 25–29.8 µm (means).
Grows in rock crevices and among boulders in forest, in canyons or in open sites, often near streams.
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