Oleandra wallichii

Oleandra wallichii has a creeping rhizome, 3–4 mm thick, with leafless segments alternating with short phyllopodia clusters. The rhizome is covered in peltate scales, 3–7 x 1–1.5 mm, with a dark center and lighter margin. Fronds are monomorphic, with a stipe 1–5 cm long, often bicolorous on the abaxial side. The lamina is 13–45 x 2–4.5 cm, with a truncate to rounded base and an abruptly caudate apex. It is thin-herbaceous, translucent, and densely covered with catenate hairs. The costa has dark coloration in the basal half and pale scales. Sori are close to the costa, with thin, glabrous or hairy indusia. Sporangial stalks lack glands below the sporangium, and spores are echinate and ridged with a solid perispore.