Rhizome long creeping, slender, 1-1.5(-2) mm in diam., densely scaly throughout; scales pale brown to dark brown, clathrate, lanceolate, (1.5-)3-5 × ca. 1 mm wide at base, margin subentire. Fronds closely spaced or distant, monomorphic; stipe short, pale green, narrowly winged to very base, densely scaly at base; lamina yellow-green, spatulate, oblanceolate, or linear-lanceolate, 5-12(-20) × 0.5-1.2 cm, thickly papery, glabrous, base decurrent, margin slightly undulate and involute when dry, apex acute; costa raised on both surfaces, veins hidden. Sori 5-8 pairs from middle to upper part of lamina, oblong, very oblique, subparallel to costa, superficial, paraphyses absent. Spores globose-trilete.
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