Plants ca. 1 m tall. Rhizome creeping. Fronds herbaceous when dried; stipe apically light straw-colored, robust, ca. 30 cm, ca. 5 mm in diam., glabrous; lamina green, 4-pinnate-pinnatifid, ovate-triangular in outline, ca. 70 × 70 cm, abaxially densely hirsute (especially on costules), adaxially sparsely hirsute; basal pinnae largest, opposite, decumbent, 3-pinnate-pinnatifid, oblong-triangular, up to 60 × 22 cm, base broadly cuneate, long stalked (ca. 6 cm), apex acuminate; pinnules ca. 20 pairs, opposite or subopposite, spreading or decumbent, linear-lanceolate, ± falcate; basal ones 2-pinnate-pinnatifid, ca. 13 × 3 cm, base truncate, symmetrical, subsessile, apex long acuminate; ultimate pinnules 20-23 pairs per pinna, spreading, lanceolate, ca. 15 × 5 mm, base acuminate, connate with costules at base, symmetrical, separated by a wide sinus, pinnatifid; segments 6 or 7 pairs per pinnule, spreading, oblong, entire, basal pair larger; middle pinnules same size as basal ones, reduced in size upward; veins pinnate, veinlets 2-forked, conspicuous abaxially, grooved adaxially; rachis, costae, and costules adaxially deeply grooved and costules with sparse pallid hairs, abaxially pubescent or glabrate.
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