Overview
Monopodial epiphytes. Stems short and rooting at the base to elongate and vining and rooting along their length. Leaves alternate, distichous, leathery, obliquely bilobed. Inflorescences racemes or panicles, pendent, arching or occasionally erect, densely many-flowered. Flowers showy, usually fragrant. Sepals and petals free, spreading, the lateral sepals inserted on the column foot. Lip three-lobed or unlobed (the lateral lobes then reduced to small wings), rigidly fused or flexibly articulated to the column foot, with a nectar-bearing spur, the spur with glandular transverse callus ridges within. Column columbiform, with an elongate foot; pollinia 2, each unevenly cleft, on a common linear stipe and viscidium.