Plants 35-70(-120) cm tall. Rhizome erect, short, scaly; scales brown, triangular to narrowly triangular, 5-7 × 1-1.2 mm, often costate with darker central zone and paler, denticulate glandular margin or long fibrillose. Fronds tufted; stipe dull to semi-shiny, grayish green to brown or stramineous-green, (12-)20-40(-50) cm, with scales similar to those on rhizome, subglabrous with age; lamina narrowly ovate-trullate to elliptic, (20-)40-70(-85) × (8-)15-25(-30) cm, base truncate, apex acute, 1-pinnate; pinnae 12-25 pairs, basal pinnae subopposite, others alternate, at an angle of ca. 50°-60° to rachis, with stalks (2-)4-8 mm, lower pinnae not much reduced, suprabasal pinnae narrowly ovate-trullate and often falcate, (5-)10-14(-23) × (0.8-)1.5-1.9(-2.5) cm, base asymmetrical, acroscopic side truncate at an angle of (40°-)55°-75°(-85°) to costa and often auriculate, basiscopic side cuneate, at an angle of (20°-)30°-40°(-60°), becoming decurrent on rachis in apical part of lamina, margin variable, from almost entire to crenate-sinuate, denticulate-serrulate or serrate to dentate, more coarsely dentate toward pinna apex, apex acuminate. Veins (1 or)2-forked, with terminal hydathode. Fronds papery, green to brownish green when dry, subglabrous; rachis dull grayish brown to green or purple, with reddish brown, reduced and fimbriate scales or 2 or 3 cellular uniseriate gland-tipped hairs, or subglabrous, terete abaxially, winged toward apex. Sori linear, (3-)9-12(-14) mm, on acroscopic veinlets, medial to supramedial; indusia grayish brown to dark brown, linear, membranous, free margin entire but often glandular and rolling back at maturity, opening toward costa, persistent.
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