Plants 20-40 cm tall. Rhizome erect, short, apex scaly; scales dark brown, narrowly triangular, entire. Fronds simple, clustered; stipe grayish stramineous, 2-4 cm, with scales; lamina lanceolate, 15-30(-36) × 2.5-3.5(-4) cm, base decurrent on stipe, margin pale, ± entire to repand or sinuate, apex acuminate to subcaudate. Midrib (rachis) distinctly raised and semiterete on both surfaces in basal half of lamina, with dark brown to black filiform paleasters (rudimentary scales), brownish; veins obscure, 1-forked. Fronds herbaceous, dark green to brown when dry, subglabrous or with small stellate scales. Sori linear, 1.4-2.1(-2.5) cm, often starting close to midrib or more medial, at an angle of (20°-)30°-40°, on acroscopic veinlets; indusia yellowish brown to deep brown, linear, thickly membranous, margin composed of thin-walled hyaline cells, entire to repand, opening toward midrib, persistent. Spores with alate perispore.
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