Epiphytic herbs. Stems pendent, terete or slightly flattened, sometimes branched, with many nodes. Leaves distichous, blade narrowly ovate to falcate-lanceolate, articulate to an amplexicaul sheath. Inflorescence lateral, racemose, few-flowered. Flowers appearing a few at a time, widely opening. Sepals and petals similar, free, spreading, abaxial surface of sepals carinate. Petals narrower than sepals. Labellum superior, spurless, broadly attached to column base, hypochile boat-shaped, with raised side lobes, epichile narrowed, apex forked into two tails, or truncate. Column lacking a foot; pollinia four, unequal, globose, stipe narrower at apex than at base, viscidium ovate.