Rhizome long creeping, 4-6 mm in diam., densely scaly; scales blackish brown, lanceolate, ca. 2 mm. Fronds close together; sterile fronds bipinnate, 40-60 cm; stipe 15-25 cm, base 2-3 mm in diam., grooved adaxially, sparsely scaly; lamina dark green when dry, broadly lanceolate, 22-30 × 10-15 cm, herbaceous, both surfaces glabrous, base rounded-truncate, apex long caudate, bulbil subterminal and small; rachis with a narrow wing; pinnae 10-15 pairs, alternate, ca. 1 cm apart, linear-lanceolate, 5-9 × 1-1.5 cm, base truncate, lobed to 1/3 toward costa, basal pairs with short stalk 2-3 mm; lobes 8-12 pairs, triangular, 5-6 × 5-6 mm, margin with sparse short teeth, with long acute spine in each sinus; veinlets 3 pairs, simple pinnate. Fertile fronds pinnate; stipe 25-40 cm; lamina lanceolate, ca. 16 × 4-5 cm; pinnae 10-12 pairs, 1.5-2 cm apart, elliptic to elliptic-lanceolate, 2-2.5 × ca. 0.6 cm, base broadly cuneate, margin subentire or slightly undulate, apex obtuse, basal pairs subopposite and 3-4 mm stalked. Sporangia inserted throughout abaxial surface.
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