Rhizome up to 10 cm, up to 13 mm in diam., with 2 or 3 rows of fronds, densely scaly; scales brownish, narrowly lanceolate, ca. 4 × 1.5 mm, subclathrate. Sterile fronds pinnate, 40-110 cm; stipe 20-60 cm, 2-7 mm in diam. near base, with 7-14 vascular bundles; lamina 25-75 × 20-50 cm, widest at or below middle, herbaceous to leathery, terminal segment 15-40 cm, subarticulate or joined to rachis, somewhat prolonged, bulbil subterminal on terminal segment or pinnae; rachis not winged; pinnae 6-22 pairs, opposite or alternate, up to 6.5 cm apart, 10-30 × 2.5-6 cm, base ± symmetrical, sometimes broadly attenuate or cuneate, margin entire or serrate or serrate-crenate, apex acuminate, lowermost 2 pinnae 1-10 mm stalked; veins forming a costal areole and several to many equally large distal ones, veinlets 4 arising from either side of lateral veins. Fertile fronds 40-120 cm; stipe 25-70 cm; lamina 15-65 × 7-30 cm, terminal segment 4-19 cm; pinnae 7-18 pairs, up to 6 cm apart, 4-20 × 0.2-4.5 cm, lowermost 2 pinnae 1-6 mm stalked. Sporangia inserted throughout abaxial surface, arrangement various.
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