Rhizome shortly creeping, densely scaly; scales brown, linear-lanceolate, margin entire. Fronds close together or tufted; sterile fronds pinnate, ca. 75 cm; stipe 20-35 cm, sparsely scaly; lamina green when dry, broadly lanceolate, ca. 48 × 20-25 cm, both surfaces glabrous, apex caudate-acuminate, bulbil subterminal; pinnae ca. 12 pairs, alternate, shortly stalked, 3-5 cm apart, 10-13 × ca. 3.5 cm, base subtruncate, margin crenate-serrate, with a fleshy spine in each sinus, apex acute; secondary veins slightly obvious, dichotomous. Fertile fronds pinnate; stipe ca. 50 cm; lamina narrowly lanceolate, ca. 46 × 10-12 cm; pinnae 10-12 pairs, subsessile, linear, 4-6 × ca. 0.8 cm, margin entire. Sporangia inserted throughout abaxial surface.
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