Plants 65-120 cm tall. Rhizome obliquely ascending, stout; scales of rhizome and stipe base brown, broadly lanceolate, 2-2.5 × ca. 1 cm, apex narrowly subulate. Fronds subcaespitose; stipe dark stramineous, 25-40 cm, 5-8 mm in diam., longitudinally grooved, glabrous distally; lamina deltoid-lanceolate or ovate-lanceolate, 50-80 cm, 40-50 cm wide at base, tripinnate or tripinnately parted, apex acuminate; lateral pinnae 8-11 pairs, oblique, approximate, basal pair largest, narrowly deltoid-lanceolate or lanceolate, 20-25 cm, 12-14 cm wide at base, with ca. 1 cm stalk, apex bluntly acuminate; pinnules 10-15 pairs, oblique, approximate, basiscopic pinnules equal to acroscopic ones, lanceolate, 7-9 × ca. 2 cm, base cordate, shortly stalked, apex bluntly acuminate; ultimate segments 7 or 8 pairs, suboblong, ca. 1 × 0.6 cm, margin translucent, softly cartilaginous, sparsely serrate, tapered upward, apex obtuse or truncate. Lamina thickly leathery, both surfaces glabrous; rachis dark brown, with lanceolate scales, pinna rachis subglabrous; veins impressed on both surfaces. Upper part of lamina fertile, lower part sterile. Sori in 1 row on each side of costa; indusia dark brown, orbicular-reniform, papery, persistent.
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