Hymenophyllum rarum

Rhizome creeping, slender, thread-like, without hairs. Fronds distant or crowded, often pendent, 5–15 cm long. Stipe short, slender, usually not winged, sometimes with a few hairs at base. Rachis slender, narrowly winged. Lamina 1–2-pinnate, narrowly oblong to ovate, pale grey-green, dull; ultimate segments linear to oblong, comparatively broad; margin entire; apex blunt. Sori towards tip of frond, terminal on lateral pinnae segments, partly immersed in lamina; indusium 2-lipped, narrower than segment, more or less rhomboidal, apical margins entire; V-shaped lower edges of indusium bordered by a forked vein; receptacle short.