Rhizome long-creeping. Fronds pinnate, very closely spaced, stipes 2–5 mm apart in each row. Stipes 6–17 mm long, glabrous or with simple glandular hairs. Lamina linear in outline, 6.2– 11+ x 0.1–0.2 mm wide, apex bluntly pointed, base long-attenuate, deeply pinnately divided to a distance 0.1–0.2 mm wide from the midrib in sterile part of lamina, in apical fertile part of lamina 1/8-1/10 entire, pinnae 19–37 pairs, longest pinnae ± 1 x 1 mm, triangular in outline, apex bluntly pointed to rounded, with simple glandular hairs on lower surface of rhachis; lateral veins simple, free, each vein ending marked by a round to elongate hydathode on upper surface of lamina. Sori fused between veins and across rachis at maturity, on 2– 8 pairs of veins, in apical 1/8– 1/10 of lamina, 1 per frond.

On rocks in fast flowing river, with bryophytes, Hymenophyllum tunbrigense and H. peltatum.

See African distribution.

Tanzania .

Lithophytic.