Rhizome creeping horizontally or slightly ascending, stout, up to 15 cm. or more long, emitting, at least in young plants, very slender horizontal roots up to ± 10 cm. long, bearing buds that produce offset plants. Stipites clustered to approximate. Stipes (10)-15-20 cm. long, deeply grooved above, ± paleate, stout, winged. Rhachis stout, winged, as are costae. Lamina 10-60 × 10-15 cm., lanceolate-oblong, submembr., rather pale green, very glossy above, bipinnate, acuminate. Primary pinnae numerous, 10-15 × 2.5-5 cm., lanceolate to ovate-lanceolate, decurrent; again pinnate in lower part, pinnatifid in upper. Secondary pinnae 15-30 × (5)-10-15 mm., about oblong, crenately lobed, sessile by cuneately narrowed decurrent base. Sori narrow-oblong, 3-10 mm. long, nearer costule than margin; indusium firm.
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