Rhizome short creeping, not white waxy. Scales densely set, slightly spreading, widest near the base, ovate or triangular, the margin denticulate, apex acuminate to slightly caudate, clathrate throughout, dark black on central region. Fronds monomorphous, subcoriaceous, iridescent blue in color when living, linoleum brown in dry specimens. Lamina simple, narrowly elliptic, apex long acuminate, base attenuate, the stipe more or less winged, margin entire. Sori separate, mostly irregularly scattered on simple free veins or on 2-3 connective veins, usually occupying the apical half of the lamina, more or less round, slightly immersed; sporangium hyaline when young, turning black when mature; spores concavo-convex, yellowish hyaline.
