Terrestrial or epiphytic plants with pseudobulbs. Leaves 1 to several, articulate or not. Stem usually slender. Inflorescence few to many-flowered. Flowers resupinate, variable in size, rather small. Perianth segments spreading or reflexed, subequal, petals narrower. Labellum adnate to base of column, entire or lobed, ± reflexed from a short base. Column slender, elongate, incurved, slightly winged towards the apex; anther terminal, ± incumbent; pollinia 4, waxy, without caudicles or viscid glands. Stigma entire.