Plants 15-30(-35) cm tall. Rhizomes creeping, strong, 3-4 mm in diam., surface exposed between scales, white farinose; scales closely appressed, bicolored, nearly black with much paler brown margins, broadly ovate-lanceolate, ca. 1 × 1 mm, margins brownish and with irregular sharp spines, apex acuminate; lumina fine and dense; scales at rhizome apex denser, lanceolate, 1-2 × 0.7-1.2 mm. Fronds closely spaced or remote; stipe (1-)2-3.5(-8) cm, robust, 1.3-1.5 mm in diam., sparsely scaly; lamina brownish or gray-green on both surfaces when dried, lanceolate, widest 1/3-1/2 from base, both ends attenuate, (8-)10-28(-35) × 1-4 cm, herbaceous or thinly papery, abaxially with sparse adnate scales, adaxially glabrous, base cuneate, long decurrent, margin flatly straight and entire, apex acuminate or obtuse; costa raised on both sides, veinlets normally obscure. Sori usually along distal half of lamina, or near end of lamina, closer to costa, elliptic or suborbicular, 2-5 mm in diam.; paraphyses black, suborbicular, 0.5-0.8 mm in diam., membranous, margins erose; central lumina large and transparent, with marginal lumina irregular, cell walls brown, thickened.
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