Microlepia speluncae

Rhizome widely creeping, branched, 5-10 mm diameter; rhizome hairs few, pale, up to 4 mm long. Fronds widely spaced, membranous. Stipe up to 1 m long, brown, glabrous at maturity. Lamina yellow-green, 0.4-1.8 × 0.1-1.4 m, 3-4(-5) pinnatifid, triangular to ovate in outline. Pinnae alternate, narrowly oblong to oblong-lanceolate, up to 60 x 21 cm, 2–3-pinnate to 2–3-pinnatifid, acute; pinnules alternate, up to 13 x 6 cm; ultimate segments oblong-lanceolate, 4-12 x 3-4 mm, with rounded apex and lobed margins, both surfaces and costules with soft short hairs. Rhachis thinly set with minute soft hairs, eventually glabrous. Sori 2-10(-20) per segment, circular, 1 mm diameter, intramarginal, situated at the end of the veins, which shows as a hydathode on the upper surface; indusium cup-shaped and facing outwards.