Trunk erect, 6-10 m. Fronds 2-pinnate-pinnatifid, 2-3 m; stipe dark, almost black, with sparse scattered scales and ± scabrous; scales dark, lanceolate, margin with pale fringes; rachis dark purple, abaxial side sparsely hirsute; pinnae up to 70 cm; largest pinnule 12-14 × 2.5-3(-4) cm, often with a lower free basal segment, other part pinnatifid to 1-2 mm to costule; veins 10-12 pairs, simple or forked; pinnule segments slightly falcate, subentire, apex obtuse, serrulate; both sides of costule, midvein, and veinlets with spreading gray stiff hairs ca. 0.5 mm; small scales often at base of costules. Sori close to midveins of fertile pinnule segments; paraphyses gray, longer than sporangia; indusia absent.
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