Epiphytic herbs. Vegetative parts glabrous. Stem not dilated or swollen, loosely covered by distichous leaf bases or by light brown sheaths throughout, bearing few leaves toward the apex. Leaves linear or lanceolate, conduplicate, often arranged in a fan, obliquely bilobed at apex. Inflorescence manyflowered, erect or arching, axillary or arising from the terminal node of stem, glabrous or densely covered in white stellate hairs; bracts not conspicuous, triangular, hairy. Flowers nonresupinate or rarely resupinate, arranged in whorls or in a spiral. Sepals glabrous or pubescent on the outer surface, dorsal sepal free, lateral sepals broadly triangular, broadened ventrally at base or obliquely ovate-triangular, broadened ventrally at base, adnate to column foot forming a distinct conical mentum, covering labellum. Petals smaller than sepals. Labellum obscurely to prominently trilobed, shortly spurred or saccate at base, sometimes pubescent within, callus (if present) threeridged, the outer ridges rugulose. Column shorter than column foot; pollinia eight, in two groups of four, clavate, base elongated and each group attached to a common viscidium. (PC, YN).