Bijdr. (1825) 410
Sympodial terrestrial plants. Stem elongated, slightly succulent, basal part creeping, forming a rhizome, apical part erect. Leaves few, sheathing at the base, glabrous, persistent, convolute, usually green, herbaceous. Inflorescence a several to many-flowered terminal raceme. Flowers small, resupinate, usually red-brown with a white mid-lobe to the lip. Sepals free, lateral sepals patent. Petals free, about as long as the dorsal sepal, usually cohering at the apices Lip spurred, not mobile, spur slender, bilobed at the apex, inside without warts. Column-foot absent. Pollinia 2, sectile, caudicles present, stipe absent, viscidium present. Stigma lobes not separated.
Central and South America, Sri Lanka, tropical continental Asia, Malaysia, Indonesia, the Philippines, Papua New Guinea, Pacific islands, east to Tonga. About 60 species; in New Guinea c. 10 species.
Terrestrial in lowland and montane forest.
Rare and inconspicuous forest floor plants similar to Eurycentrum, Vrydagzynea, etc., distinguished by the lack of glands or warts in the spur.