Trunk erect, up to 5 m or more tall, ca. 15 cm in diam. Stipe and rachis brown to dark purple-brown, not spiny, with wartlike projections and scales; scales lanceolate, 16-20 × ca. 2 mm, pale brown, lustrous, or minute and irregular, sometimes with a light brown central longitudinal band, margins flabellate-celled at base, with reddish setulae; lamina 2-pinnate-pinnatifid, up to 2 m; lowest pinnae usually reduced; pinnae up to 35-50 cm; pinnules 5-9 × ca. 2 cm, mostly divided up to costules into adnate segments; abaxial side with flat yellowish scales 5-6 mm, with flabellate margins and very small farinose brown scales; adaxial side of costae densely covered with matted brownish hairs and narrow scales; abaxial side of costules with light brown bullate scales; veinlets usually forked. Sori costular; indusia lustrous, brown to purplish, globose, opening along an apical slit, later fragmenting and sometimes appearing cup-shaped; paraphyses absent.
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