Rhizome subcylindrical, 3-5 mm in diam., (often) white waxy beneath scales. Scales pseudopeltate, apically densely set, otherwise sparsely set, distinctly spreading, narrowly ovate or triangular, 2.5-4(-8) × 0.5-1.5 mm, margin denticulate, clathrate or subclathrate, central region glabrous. Fronds not or slightly dimorphic. Stipe up to 7 cm, 0.5-1.5 mm in diam. Lamina simple, narrowly elliptic to narrowly obovate to linear, 10-40 × 1.5-5 cm, subleathery, base narrowly decrescent, stipe winged for a considerable part, margin entire, apex acuminate. Veins ± sunken and indistinct, or sunken and distinct. Sori separate, mostly irregularly scattered, sometimes forming 2-8 irregular rows between veins, orbicular, superficial or slightly sunken; paraphyses often with apical cell large and curved.
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