Rhizome thick, creeping, densely clothed with reddish brown, linear-lanceolate scales. Frond (30-)50-100 cm; stipe stramineous, 13-45 cm, 2-3 mm in diam., base with scales similar to those on rhizome, gradually sparser or glabrescent upward; lamina 1-pinnate, grayish green when dried, oblong or lanceolate, 16-55 × 9-22 cm, thinly leathery, glabrous on both surfaces or axes sparsely bearing brown, linear scales abaxially, shiny adaxially, apex with a conform terminal pinna or gradually reduced, acuminate, rachis glabrescent; (lateral) pinnae 6-13 pairs, alternate or lower pairs opposite, spreading or slightly ascending, stalked, broadly to narrowly lanceolate, sometimes falcate, 6-15 × 1.5-3 cm, base symmetrical or nearly so, cuneate, apex acuminate to shortly caudate, margin strongly serrate, crenate, or shallowly lobed, teeth or lobes usually with 1-5 cartilaginous aristate tips; veins pinnate, veinlets 2-4 pairs on each set of lateral veins, veinlets simple or forked. Sori terminal or subterminal on veinlets, in 1-3 rows on both sides of midvein of ultimate segment; indusia brown, membranous, and fugacious.
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