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Rhizome long-creeping, scaly; scales dark brown with fine ciliate margins; roots with very narrow, linear cells. Fronds large, scandent or erect, consisting of 1–5 (or more) tiers of opposite pinnate primary branches. Stipes scattered along rhizome; rachis bearing dark brown scales with pale ciliate margins, glabrescent. Pinnules linear to narrowly oblong, lobed with linear to triangular ultimate segments; lowermost pinnule pair on primary branch stipule-like, broadly triangular, deeply lobed, initially covering a dormant rachis bud; venation open, dichotomous. Sori of 2–4 large sporangia, arranged in 2 rows along ultimate segments on distal fork of veins. Spores trilete, tetrahedral; surface smooth to slightly rugose.
