Plants 5-17 cm tall. Rhizomes long and creeping, 1.5-3 mm in diam., densely scaly; scales ± deep brown, lanceolate to ovate, 3.5-7 × 0.7-1 mm, brittle, transparent, base ovate, margins shortly dentate, apex shortly acute; basal lumina isodiametric, ± square, distal ones subrectangular. Fronds remote or ± closely spaced; stipe straw-colored, 0.7-6.3 cm, slender, less than 1 mm in diam.; lamina greenish or brownish green on both surfaces when dried, lanceolate, both ends attenuate, 4-20 × 0.8-1.5(-2) cm, widest at or below middle, herbaceous to submembranous, almost glabrous, base cuneate, slightly decurrent, margin flat and straight, apex bluntly acuminate to gradually long attenuate; costa slightly raised on both sides, veinlets ± visible. Sori along 7/8 of length, midway between costa and margins, suborbicular, 2-2.5 mm in diam.; paraphyses dark brown, stellate or lanceolate, margin with long spines; lumina large and transparent. Sporangia leptosporangiate: dehiscent with narrow annulus of very thick-walled cells, or platygyroid: indehiscent with wide annulus of thin-walled cells.
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