Rhizome dorsiventrally flattened, 4.5-7 mm wide, short-creeping, internodes 3-15 mm long or longer, not white waxy, roots sparsely set; vascular strands 11-15, with sclerified sheaths, sclerenchyma strands absent. Scales pseudopeltate, densely or sparsely set, appressed to distinctly spreading, ovate, narrowly ovate or triangular, 3.5-8 by 1.5-2.5 mm, margin entire, apex acute, clathrate except in a hyaline marginal region, central region glabrous. Fronds not or slightly dimorphic, stipitate, herbaceous. Sterile fronds: stipe 10-25 cm long, 1-3 mm thick; lamina 35-40 by 30-35 cm, widest below or about the middle, index 1-1.5; basal part pinnate, apical part pinnatifid or pinnate, lobes 4 or 5 at each side, longest lobes at position 2 from base, widest about or below the middle, 15-25 by 3.5-6 cm, index 4-4.5, margin entire, apical lobe conform to upper lateral lobes, apex acuminate, lower surface without acicular hairs. Venation: veins prominent and distinct (except the smallest), 7-13 (-17) mm apart, more or less straight, dichotomously branched about the middle to near the margin, catadromous, connecting veins forming a row of large areoles bordered by several smaller areoles; included venation variously anastomosing, more or less immersed and indistinct, free veinlets simple to twice forked. Sori separate, round, superficial or slightly immersed, irregularly scattered on the smallest veinlets, over the whole surface of the lamina, 15-25 per sq.cm, present in marginal and costal areoles; paraphyses simple uniseriate hairs with glandular topcells, 3-celled.
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