Plants 3-4 m or more tall. Rhizomes erect, cylindric, with dense scales; scales brownish, ciliate along margins, long subulate and thick. Fronds clustered; stipes 60-100 cm, thick, ca. 2.5 cm in diam., stramineous, polished, bases with similar scales as on rhizomes, distally scales sparser, after falling leaving tuberculate or lunate rough marks; laminae large, triangular-ovate, long and wide, to above 2 m, not tapering to bases, 4-pinnatifid, acuminate and pinnatifid at apices; pinnae 18-25 pairs, subopposite, spreading, proximal ones stalked, oblong-lanceolate, ca. 60 × 30 cm, 3-pinnatifid, acuminate at apices; pinnules of 1-pinnate laminae large, spreading, shortly stalked, lanceolate, 10-16 × 3-4 cm, bases truncate, symmetrical, pinnate-pinnatifid, apices acuminate. Pinnules of 2-pinnate laminae 18-25 pairs, subopposite, spreading, sessile, lanceolate, slightly falcate, 1.5-2 × ca. 0.4 cm, bases decurrent, connected to each other by narrow wing along costae, pinnatifid to 1/2 or more of distance to costules, apices pointed; segments 10-12 pairs, crenatelike or triangular, oblique distally, entire. Veins pinnate, veinlets 2 or 3 pairs per segment, forked, not evident. Laminae herbaceous, when dry yellowish green, abaxial sides with multicellular acicular hairs along costules and main veins, costae with sparse linear-lanceolate scales abaxially, scales inflated at bases, persistent, adaxial sides with short acicular hairs along costae. Sori small, orbicular, 1 pair per segment, attached near top of basal acroscopic veinlets; indusia not developed. 2n = 62.
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