Rhizome rather short-creeping, 1 mm ø; scales not seen. Leaves close; petioles quadrangular, sulcate, blackish, narrowly pale-margined, c. 5 cm long, almost as long as the lamina. Lamina simply pinnate, c. 5-7.5 cm long; rachis similar to the petiole. Pinnules c. 4-8 to a side, almost contiguous at their bases, spreading, subtrapezi-form to 1/4-elliptic-subligulate, 1-2 cm long, 5-8 mm wide, 2-2.5 times as long as wide, dark green when dry, herbaceous; upper margin outward increasingly convex, a distinct outer margin hardly or not developed. Margin of smaller pinnules entire, in larger ones the upper/outer margin with 1-3 oblique rather broad incisions to 1 mm deep. Upper pinnules very little reduced; terminal pinnule free, large, flabellate with cuneate base, almost symmetric, with convex upper margin, incised like the lateral ones, c. 1 cm long and 1.5 cm wide. Veins immersed, not evident, mostly twice forked, regularly anastomosing, with one or towards the apex of the pinnules two series of areoles 1-1.25 mm wide. Sori interrupted by the incisions of the margin, if any, also on the outer margin of the terminal pinnule, 4-to plurinerval; indusium greenish, subentire, 1/4 mm wide, falling short of the margin by 0.5-1 times its width. Spores very pale brown, trilete, smooth, c. 20 μ.
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