Renanthera Lour., Fl. Cochinch. 2 (1790) 521
- Genus Nephranthera Hassk. in Hoev. & De Vriese, Tijdschr. 9 (1842) 145
- Genus Ascoglossum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1913) 974
Monopodial epiphytes. Stem usually much elongated. Leaves many, arranged in two rows, sheathing at the base, glabrous, deciduous, duplicate, leathery. Inflorescence lateral, a many-flowered panicle. Flowers small to medium-sized, resupinate or not, bright (orange-)red or yellow with red markings. Sepals free, the lateral sepals often much longer and broader than the medium sepal. Petals free, similar to the dorsal sepal. Lip sac-shaped, not mobile, inside without callosities, much shorter than the sepals, with a small, usually recurved midlobe. Column short. Column-foot absent. Pollinia 4, about equal or slightly unequal in size, solid, caudicles absent, stipe present, viscidium present.