Rhizome short, sts branched, rather slender, densely clad when young in pale brown ovate to ovate-lanceolate paleae up to 5 mm. long; stipites crowded. Stipes slender, up to 2 cm. long, very narrowly winged, wings merging into lamina, glab. to ciliate. Lamina dark green, submembr. to coriac., linear-lanceolate to narrow-oblong, obtuse to subacute, entire to rather obscurely sinuate, sts with a few slender hairs on lower surface, with or without a slightly thickened margin; 3-15 cm. × 2-5-(8) mm.; main vein evident, veinlets evident to obscure, simple or forked. Sori slightly oblique, us. ∞, sts confluent; in a single row on each side of main vein, nearer to it than to margin; up to 30 subopp. pairs; oblong, 6-3 mm. long, without or with a few hairs.

n = 37

Rhizome erect to short-creeping, rarely long-creeping; paleae light brown, lanceolate to narrowly lanceolate, acute to broadly acute, 2.2-6.3 × 0.48-1.5 mm. Stipes indistinct, winged almost to base; stipe hairs whitish to pale red-brown, sparse to common, 0.3-1.5 mm. Lamina linear-oblanceolate, rarely elliptic to oblanceolate, acute or rarely + obtuse, (2.6-)5.6-13.6(-24.5) × (0.3-)0.39-0.69(-1.1) cm; lamina hairs to 1.0 mm; sparse to absent on margin, midrib and lamina, similar to those on the stipe; texture thinly coriaceous to coriaceous; veins visible or invisible, rarely raised on upper and lower surface in dried material, endings not darkened; midrib raised below, usually darker than lamina. Son oblong to linear, oblique, in upper and middle part of frond, 2-27 pairs, 1.5-7.5 × 1.0-2.0 mm; soral vein ending within the sorus or extending a little beyond it, shorter than basiscopic vein, neither reaching the margin. Sporangia (150-) 177.5-208.9 (-260) mcm long; indurated cells of annulus (9-)10.4-12.4(-15). Spores (18-) 23.3-26.1 (-31) mcm diam.