Rhizome dorsiventrally flattened, ventrally grooved when dry, 3-4 by 2-3 mm thick, brown; phyllopods 2-7 cm distant. Anatomy: vascular strands 10-12, with dark bundle sheaths, sclerenchyma strands few, up to c. 20. Rhizome scales inserted evenly, persistent, densely set, appressed at base, often with a strongly squarrose acumen, pseudopeltate, monomorphic, deltoid, 1.7-3.4 by 0.6-1.2 mm, index 2.6-2.9, basal auricles rounded, margin at the base sparsely set with glands, dentate, teeth longer at base, apex filiform, entire or finely dentate, cell walls clathrate throughout, more strongly thickened in the central part of the acumen, yellowish, superficial hairs present. Fronds pinnate, stipe 3-4 mm thick, 0.5 as long as the lamina, glabrous; lamina 50-60 by 26-30 cm, index 1.7-1.9, widest at the base; pinnae articulate, shortly petiolate, 15-19 by 1.5-2.7 cm, index 7-10, base angustate, margin entire to crenate, apex acuminate to caudate; basal pair 2-3 cm distant from next pair and equally long, not deflexed, apical segment conform, equally long as or slightly shorter than longest pinnae. Venation: areoles 3-serial, marginal veinlets up to 1/3 as long as the areole, simple or forked, often anastomosing. Indument: 2-celled glandular hairs present, acicular hairs absent. Sori uniserial, costal, slightly sunken, 2-3 mm diam., receptacular scaly paraphyses persistent, clathrate, 90-410 by 80-205 µm, 3 or more cells wide. Sporangia glabrous. Spores yellow, cristate, with short polar excrescences.
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