Plants terrestrial, 60-80 cm tall. Rhizome erect, short, stout, 1-1.5 cm in diam. Stipe deep brown, 35-40 cm, grooved above, sparsely scaly; scales light brown, lanceolate, 4-6 mm, membranous, entire, acuminate at apex. Lamina bipinnatifid to pinnate toward apex, light brown when dried, triangular-ovate, 35-50 × 25-30 cm, papery, with sparse articulate off-white hairs adaxially, occasionally with lanceolate brown scales, base cuneate, apex acuminate; rachises and costae stramineous, densely clothed with articulate off-white hairs; free lateral pinnules 4-6 pairs, subopposite, interval 2-3 cm, upward; basal pinnules ovate-lanceolate, large, ca. 20 × 7-8 cm, bases cuneate, apices acuminate, stalks 0.8-1 cm, pinnatipartite with a single pair of separate lobes, lobes 8-10 pairs, alternate, slightly oblique, broadly lanceolate, 5-8 × 1-1.5 cm, acuminate, basal pairs nearly free, serrate upward, interval 2-3 cm, conjoined with broad wings; middle pinnules lanceolate, 12-15 × 2.5-3 cm, bases adnate to rachis, decurrent ± beneath, apices acuminate, pinnatipartite, lobes falcate-lanceolate, 1-1.5 × 0.8-1 cm, acuminate, entire. Veinlets forming 1 row of areoles along rachises and costae, veins free toward apex, raised on both surfaces. Sori orbicular, central on veinlets, in 1 or 2 rows beside main veins.
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