Rhizome terete to dorsiventrally flattened, 0.3 cm thick, 1-2 cm wide, short-creeping, internodia up to 10 cm long. Anatomy: vascular bundles 15-30, equally sized, arranged in a single row, without dark bundle sheaths, sclerenchyma strands absent. Rhizome scales squarrose or spreading from an appressed base, peltate, dimorphic; the elongate scales 2-12 by 1.5-3 mm, index 1.5-6, acumen often subulate, suddenly contracted from a wide base, often with a distinct, brown midrib, margin irregularly and shortly dentate at base, nearly entire in the acumen. Fronds dimorphic, glabrous, rachises not or rarely persistent. Base fronds contiguous or overlapping, often completely covering and surrounding the rhizome, sessile, nearly entire to shallowly lobed, 4-8 by 3.5-7 cm, index 1-1.3. Foliage fronds stalked, stipe up to 15 cm long, conspicuously winged with a sinuose wing, lamina pinnatifid to 0.2-0.5 cm from costa, 17-25 by 12-17 cm, index 2-3, apex aborted. Pinnae with basal constriction, all equally long or the lowermost pinnae sometimes reduced, 7-10 by 1-2.5 cm, index 3-4, margin entire, apex obtuse, acute or acuminate, free veinlets simple or absent, hydathodes absent. Sori in 2 irregular rows parallel to the veins, often concentrated near the midrib and the margin, 2-4 in each main areole, round, 1-2 mm, slightly sunken. Sporangia glabrous. Spores with spines.
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Rhizome shortly creeping, terete to dorsiventrally flattened, ca. 3 mm thick, 1-2 cm wide; scales squarrose or spreading from an appressed base, peltate, 2-12 × 1.5-3 mm, abruptly contracted from a broad base, often with a distinct, brown midrib, margin irregularly and shortly dentate at base, acumen often subulate and subentire; fronds dimorphic, glabrous; basal fronds contiguous or overlapping, often completely covering and surrounding rhizome, sessile, (4-)10-15 × (3.5-) 8-12 cm, subentire to shallowly lobed; foliage fronds stalked, stipe up to 20 cm, conspicuously winged with a sinuous wing; lamina pinnatifid up to ca. 1 mm from costa, 30-70 × 20-30 cm, apex aborted; pinnae 3-7 pairs, slightly ascending, 1.5-3 cm distant, broadly lanceolate, 7-20 × 2.5-5 cm, base slightly narrowed and decurrent, margin subentire to shallowly sinuate, apex obtuse to long acuminate. Sori in 2 irregular rows between costa and margin, 2-4 rows between lateral veins. Spores with spines.
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