Rhizome long creeping, robust, 6-8 mm in diam., densely covered with scales. Scales dark brown, ovate, long subulate upward, ca. 7 mm, margin ciliate. Fronds remote, 2-3 cm apart; stipe brownish stramineous, adaxially grooved, 12-15 cm, 2-2.5 mm in diam., base densely covered with brown scales; lamina dark brown when dry, tripinnate or base 4-pinnate-pinnatifid, pentagonal, 18-22 × 18-22 cm, thickly papery, base cordate, apex acuminate, shallowly dentate. Petiolules 4-6 mm; pinnae ca. 10 pairs, basal 2 pairs subopposite, alternate upward, apex obtuse or acute, largest pinnae triangular, 10-12 × 8-10 cm; upper pinnae shortened to oblong-lanceolate, base oblique, apex shortly acuminate; pinnules 8-10 pairs, shortly stalked, alternate, with first basiscopic pinnule enlarged, oblong-lanceolate, 5-6 × 2.5-3 cm, base cuneate, pinnatipartite to rachillae with narrow wing, apex acute; ultimate pinnae ca. 6 pairs, subsessile, basal pairs larger, oblong, 10-12 × 4-5 mm, base cuneate, decurrent, apex rounded-obtuse. Veins brown, palmately forked, distinct abaxially. Sori separate, borne several on a segment, each at forking point of veins; indusium rufous, attached along sides, submarginal to lamina, tubular, ca. 1.5 × 1 mm, thickly membranous, apex truncate.
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