Rhizome short-creeping, c. 2 mm ø; scales (few seen) reddish brown, narrowly triangular, % mm long, to 4-seriate at base, with a very short uniseriate apex. Leaves close; petioles stramineous to pale reddish brown, stout, quadrangular with shallowly sulcate sides, c. 15-30 cm long, about as long as the lamina. Lamina simply pinnate, linear, c. 15-40 cm long, 4½-5½ cm wide; rachis similar to the petiole. Pinnules c. 12-30 to a side, spreading or slightly ascending, firmly herbaceous, mostly dark green when dry, usually not contiguous, elongate-parallelogram-shaped to ligular, 2 by 0.6 to 3.5 by 1 cm, 3-3.5 times as long as wide, subsessile, little narrowed to the apex, this rounded or occasionally caudate-protracted; upper margin with 5-7 major incisions, these rather oblique, reaching 1/4-1/3 down, narrow, the largest lobes sometimes more shallowly incised again; lobes slightly convex, often erose. Sterile pinnules not seen. Relatively few upper pinnules reduced, mostly one of c. 0.75 cm adnate to the narrow, lanceolate, lobed terminal segment. Veins immersed but evident, especially above, very oblique, regularly anastomosing, often with 2 series of areoles between the two margins, almost 1 mm apart at the vein-bases. Sori single in the lobes, usually on 4-8 veins, the one on the outer margin often continuous with the outermost of the upper; indusium pale, erose, 1/4-1/3 mm wide, not reaching the margin by about the same distance or less, reflexed and ± concealed at maturity. Spores pale brown, trilete, smooth, c. 19-22 μ.
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