Plants 25-40 cm tall. Rhizomes shortly creeping, 2-3 mm in diam., apex densely scaly; scales dark brown, narrowly triangular, entire; phyllopodia distinct, ca. 2 mm tall, 2-3 mm apart. Fronds grayish green when dry, herbaceous; lamina 1-pinnate, narrowly triangular to lanceolate, 10-20 × 3-5 cm, widest in basal 1/3, gradually narrowing toward apex, glabrous; stipe shiny, purple, 10-25 × 0.05-0.15 cm, subglabrous, base sparsely scaly; rachis shiny and purplish abaxially, adaxial side grooved and with 2 grayish green narrow wings; pinnae almost sessile to shortly stalked with rachis color extending via stipicel onto base of costa abaxially, 15-25 pairs, alternate, spreading or deflexed near stipe, quadrangular-trapeziform, 2-3.5 × 0.6-1 cm, base asymmetrical, acroscopic side truncate and parallel to rachis, subauriculate, basiscopic side attenuate-cuneate, with 1/3-1/2 cut away, acroscopic margin serrate to sinuate, teeth not retuse, pinna apex obtuse to subacute. Veins forking and terminating in marginal teeth, only 1 or 2 basal basiscopic veins lacking. Sori linear, 3-4 mm, medial; indusia brownish, linear, membranous, entire, opening toward costa.
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