Bull. Jard. Bot. Buitenzorg, sér. 2, 26 (1918) 93
Very small monopodial epiphytes. Stem very short. Leaves few, arranged in two rows, sheathing at the base, glabrous, deciduous, duplicate, leathery. Inflorescence lateral, a many-flowered raceme, rarely branched. Flowers very small, resupinate, thin-textured. Sepals free. Petals free, rather similar to the dorsal sepal. Lip adnate to the column, spurred, the spur inside without callosities. Column-foot absent. Pollinia 4, very unequal in size, arranged in two bodies, solid, caudicles absent, stipe present, viscidium present.
Northeast India, Southeast Asia, Malaysia, Indonesia, the Philippines, Papua New Guinea, Australia, Pacific islands, east to Fiji. About 10 species; in New Guinea about 7 species.
Epiphytes in lowland and hill forest.
Insignificant and rarely cultivated monopodial epiphytes in the affinity of Malleola, from whcih they differ in the number of pollinia.