Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1: 976 (1913)
Epiphytic herbs. Roots terete, not or sparsely branching, glabrous, smooth. Stem rooting at the base, patent. Leaves 3–5, conduplicate, articulate, distichous, subfalcate, oblong, twisted at base so as to lie in one plane with stem, surface appearing velvety-opaque, margins finely crenulate, apex asymmetric. Inflorescence lateral, solitary, racemose, 5–12-flowered; peduncle elongated, patent, thinner than the swollen, angular, geotropic rachis. Flowers resupinate on pendent rachis, 1–3 cm wide, ephemeral, opening in succession or in successive groups, 1 to 12 at a time, quaquaversal, colourful, sometimes fragrant. Sepals and petals entire, free, obovate, concave, rounded to obtuse. Labellum hinged with apex of column foot, not spurred, trilobed, often with a callus between lateral lobes, midlobe spur-like but not hollow. Column semi-terete, ciliate or pubescent, sometimes with glandular hairs, column foot hardly discernible, shorter than column; anther helmet- shaped, pollinia four, hemispherical, in two subglobose masses, stipe longer than pollinia, oblong; rostellum bidentate after removal of pollinarium. Capsule oblong, angular and slightly curved.