Rhizome 2-3 mm ø, mostly not short-creeping; scales to 2.25 mm long, to 8-seriate at the base, with a short uniseriate apex. Petioles atropurpureous, shining, abaxially terete or upwards obtusely carinate. Lamina rarely simple, mostly once pinnate, with 1-5 pinnae to a side and a conform terminal one. Rachis like the petiole, abaxially terete or obtusely carinate, rarely obtusely bi-angular. Pinnae lanceolate, acute or acuminate, chartaceous or subcoriaceous, 10-25 cm long, 1-2.5 cm wide, 6-15 times as long as wide, widest above the scarcely unequal base, not rarely sterile, then entire; terminal pinna the largest. Costa stout, stramineous to dark brown. Areoles in 2 or 3 rows, often to 2 mm wide. Indusium entire, usually not over 0.3 mm wide. Spores yellowish brown, trilete, smooth, c. 20 μ.
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