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Stems stout, short-creeping, densely and conspicuously scaly; scales pale brown. Leaves clustered, 1--2 m. Petiole straw-colored to brownish red, to more than 1 m, scaly proximally, otherwise glabrous at maturity. Blade deltate to pentagonal, pedate, ultimate divisions pinnately divided, 1--2 × 1--2 m; rachis not winged. Pinnae few, closely spaced, remaining green through winter, not decurrent on rachis, not articulate to rachis, oblong-lanceolate, 1--3-forked, to 7 × 6 dm; base asymmetrical, acute; apex acute; rachis and costae glabrate or with minute hairs, especially near axils of proximal pinnae; penultimate pinnules linear to linear-lanceolate, pinnatifid, separated, not remaining green through winter, not articulate to rachis. Ultimate segments of blade numerous, linear-oblong to linear-lanceolate, to 19 × 6 mm, margins entire or serrulate, apex obtuse and rounded to acute; terminal segments 3--4 cm longer and more tapering than lateral segments. Veins anastomosing near costae and costules, becoming forked and free near margins of ultimate segments. Sori narrow, blade tissue exposed abaxially.
Large terrestrial ferns. Rhizome short, erect, stout; scales small, triangular, pale brown. Fronds monomorphic. Stipe erect, often 50–150 cm long, stramineous to greenish, robust, grooved, with scattered basal scales. Lamina ±round, broadly triangular or pentagonal, to c. 1.7 m across, herbaceous to chartaceous, glabrous, divided into 3 or more subsimilar radiating 1-pinnate-pinnatifid elements; central element largest. Pinnae to 15 cm long, deeply pinnatifid, shortly stalked; lobes slightly falcate, to c. 35 mm long, to c. 5 mm wide, serrulate (especially the sterile ones), separated by rounded sinuses; veinlets forming elongate areolae along the midvein. Sori broken at lobe apices and sinuses; indusium entire; paraphyses abundant.
A fern. It grows 2 m tall. The rhizome is erect and short. It is 2 cm wide. The fronds are clustered.
Rhizome erect, short and thick with broad concolorous scales.
