Plants terrestrial, ca. 2.6 m tall. Rhizome creeping, ca. 15 mm in diam., densely brownish shortly hairy. Fronds distant; stipe brown, 1.2-1.5 cm in diam., smooth abaxially; rachillae densely brownish villous; lamina yellow-brown when dried, 4-pinnatisect, oblong, 100-200 × 70-150 cm, thinly herbaceous, abaxially gray pubescent throughout, with brown short hairs adaxially and along veins; pinnae many, spreading obliquely upward, with stalk ca. 1.5 cm, ovate-oblong, middle pinnae tripinnate, ca. 90 × 26 cm, apex caudate and acuminate; pinnules more than 20 pairs, alternate, ca. 5 cm apart, with stalk ca. 3 mm, anadromous, almost spreading, lower pinnules 2-pinnate, broadly lanceolate, ca. 13 × 4-4.5 cm, base equal in width, apex acuminate; ultimate pinnules 16-18 pairs, adjacent, ca. 1 cm apart, spreading, sessile, 1-pinnate, broadly lanceolate, 2.5-3 × 7-9 mm, base asymmetrical, basiscopically broadly cuneate, decurrent, acroscopically truncate, parallel to rachillae, apex acuminate; distal lobes 5 or 6 pairs, oblong to obovoid, margins shallowly crenate, apex rounded-obtuse, suprabasal ones slightly longer, pinnatifid, entire upward. Veins obvious abaxially, pinnately branching. Sori on margin and along ultimate lobules; indusium brownish, shallowly bowl-shaped, slightly hairy.
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