Plants terrestrial, more than 2 m tall. Rhizome brownish, 20-30 mm in diam., stiff and woody, with dense yellow-brown hairs. Fronds distant; stipe ca. 100 cm, ca. 1 cm in diam. at base, with dense brown hairs, distally glabrous; rachis and pinnule stalks concolorous, glabrous, rachillae densely brown shortly hairy from above middle. Lamina yellow-green abaxially, dark green adaxially when dried, 3-pinnate, more than 100 cm; pinnae 7-9 pairs, alternate, ca. 14 cm apart, with stalk ca. 5 cm, 2-pinnatisect, oblong in outline, ca. 60 × 30 cm, herbaceous, abaxially densely brown pubescent, adaxially glabrous, apex acuminate; pinnules 10-12 pairs, 5-6 cm apart, spreading, with stalk 0.4-0.8 mm, broadly lanceolate, ca. 15 × 5-6 cm, base asymmetrical, basiscopically shortly cuneate, acroscopically truncate, margin pinnatisect almost to costa, apex acuminate; ultimate pinnules 12-14 pairs, alternate, anadromous, basal acroscopic pinnule longest, ovate-oblong, ca. 3 × 1.2-1.4 cm, parallel to rachis, apex shortly acuminate; lobules oblong or subtriangular, 15-18 × ca. 8 mm, obtuse at apex, compact, progressively reduced distally to form a long acuminate pinnatifid terminal segment; ultimate lobules subentire with few obtuse teeth. Veins distinct, lateral veins pinnate, not reaching margin. Sori orbicular, terminal on veinlet, 3-5 pairs; indusium reniform, densely brown tomentose.
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