Plants terrestrial, ca. 80 cm tall. Rhizome long and creeping, 3.5-5 mm in diam., with dense long red-brown or brown hairs. Fronds remote, 1-2[-5] cm apart; stipe brown-straw-colored, [10-]20-30 cm, ca. 2.5 mm in diam., densely gray-brown villous; rachis and stalks with same hairs; lamina green when dried abaxially, black-green adaxially, 1-pinnate, broadly lanceolate to narrowly oblong in outline, 40-50 × 11-15 cm, base ± narrowed, apex long caudate; pinnae 20-40 pairs, opposite or alternate, basally 3-4 cm apart, shortly stalked to distally sessile, lower pinnae smaller, slightly reflexed; middle pinnae linear-lanceolate or falcate, 6-12 × 1-1.5 cm, herbaceous, abaxially grayish villous on veins, adaxially densely softly brown hairy on lobule midribs, each vein with sparse long hairs, base rounded-cuneate or asymmetrically hastate, both sides somewhat auriculate, acroscopic lobe larger, margin undulate-denticulate, distally serrate, often crispate, apex acuminate; terminal pinna to 15 cm, similar to lateral pinnae but symmetrical, often subhastate. Veins obliquely arising from costa, dichotomous, with 1 veinlet per tooth. Sori terminal on slender veinlet, arranged in a line near margin; indusium becoming brown when old, hemitelioid, as long as wide or slightly wider, glabrous, persistent.
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