Epiphytic herbs. Roots terete, not branching, glabrous, smooth. Stem elongate, leafy, pendent or patent-ascending to erect, rooting at base. Leaves conduplicate, articulate, distichous, linear, apex obtuse, apiculate. Inflorescence lateral, solitary, racemose, patent, many-flowered; rachis continuing the line of the peduncle, straight, elongate, glabrous, thicker than peduncle. Flowers resupinate about 0.4–0.6 cm wide, opening in succession, one or a few at a time, quaquaversal, green or ochre-yellow. Sepals entire, free, obtuse, lateral sepals strongly oblique. Petals shorter than sepals. Labellum rigidly attached, subentire, saccate, fleshy at apex. Column with foot hardly developed; pollinia two, spherical, stipe suborbicular, about as long as the pollinia. Capsule longer than unfertilized ovary, narrowly fusiform, almost rostrate.