Plants 25-35 cm tall. Rhizome erect, short, apex scaly; scales brown or reddish brown, narrowly triangular, entire. Fronds caespitose; stipe dull gray-brown, 4-6 cm, with many narrowly triangular, costate scales with dark brown central zone and almost hyaline margin, adaxially sulcate; lamina narrowly triangular to linear, 20-30 × 3-4 cm, apex acuminate, 1-pinnate to pinnate-pinnatifid; pinnae 20-26 pairs, alternate or subopposite, shortly stalked, middle pinnae obliquely rhomboid, 1.4-2 × 0.6-0.9 cm, apex acute, base asymmetrical, acroscopic side truncate and auriculate-cordate, basiscopic side narrowly cuneate, margins irregularly and deeply bisinuate-bicrenate, basal acroscopic segment most developed, flabellate-obdeltoid, often almost free from rest, first basiscopic segment below second acroscopic lobe; basal pinnae gradually and slightly reduced, often deflexed. Veins visible, basal 1/3-2/3 of costa forming lower margin, lateral veins 2-forked. Fronds herbaceous, green when dry, glabrous adaxially but usually with a small gemma near apex, abaxially with brown small scales or subglabrous; rachis gray-brown to stramineous, with scales similar to those of stipe, subglabrous when old, adaxially sulcate. Sori 5-8 per pinna, linear, 2-3.5 mm, median on acroscopic veinlets; indusia yellowish green to grayish brown, oval-linear, entire, mostly opening toward costa. Spores with lophate (cristate-alate) perispore. Plants sexual: 2n = 144.
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