Plants up to 2.5 m tall. Rhizomes stout, shortly creeping; scales dark brown, narrowly lanceolate. Fronds scattered; stipe straw-colored, 90-100 × 0.5-1 cm; lamina narrowly ovate or ovate-oblong, 80-150 × 40-50 cm, pinnate or sometimes 2-pinnate, papery, thin, both surfaces glabrous or sometimes with sparse short hairs abaxially. Pinnae 6-12 pairs; basal pair simple or pinnate, pinnules broadly lanceolate, broadly oblanceolate, or oblong-lanceolate, stalked, base cuneate to rounded, margin entire or occasionally undulate with narrow, colorless, membranous side, apex abruptly caudate. Veins distinct on both surfaces, 2-forked; hydathodes much enlarged, spindle-shaped, not extending to lamina margin. Sori extending to 2/3-4/5 of veins.
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