Plants 0.7-1 m tall. Rhizomes creeping, ca. 2 mm in diam., covered with brown hairs. Stipe brown, cylindrical, 20-30 cm, ca. 2 mm wide, glabrous; rachis 1(or 2) times dichotomously branched (apical buds degenerate); apical bud ovate, covered with dense brown hairs; bracts ovate, margin crenate; rachis without lateral pinnae at dichotomy; ultimate pinnae oblong-lanceolate, 15-25 × 5-7 cm, apex attenuate; lobes 35-50 on each side, lanceolate, 30-40 × 6-8 mm, margin entire, apex obtuse or emarginate; lamina papery, glaucous abaxially, dark green adaxially, glabrous; costae prominent on both surfaces; veins 4 or 5 in each group. Sori in 1 line on each side of costule; sporangia 12-18.
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