Rhizome terete, 1-1.5 mm wide, long-creeping, internodes 50-120 mm long, flaky white waxy, roots sparsely set; vascular strands 10-15, with sclerified sheaths, sclerenchyma strands 5-15. Rhizome scales peltate, sparsely set, appressed, round, elliptic, narrowly ovate or triangular, 0.2-0.5 by 0.2-0.3 mm, margin entire or very finely denticulate, often eroded, clathrate or subclathrate, cells longitudinally rectangular, central region glabrous. Fronds not or slightly dimorphic, stipitate, herbaceous. Stipe 3-8 cm long, 0.8-1 mm thick; lamina pinnatifid, 7-12 by 8-20 cm, base cuneate to cuneate-angustate, lobes 2-4 at each side, connected by a 0.1-0.2 cm wide wing, longest lobes at position 1 from base, widest at base, 4-13 by 0.3-0.5 cm, index 10-20, margin entire or undulate, apex acute, lower surface without acicular hairs. Venation: veins more or less immersed and indistinct, connecting veins forming one row of large areoles parallel to the costa, bordered by several smaller areoles; included venation variously anastomosing, more or less immersed and indistinct. Sori separate, round, deeply sunken, 1.5 mm diam., each sorus just outside each primary costal areole, close to the margin, visible as protrusions on the upper surface; paraphyses simple uniseriate hairs with glandular topcells.
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