Plants terrestrial with usually tuberous rhizome (corm) or pseudo-bulbous stem. Leaves coaetaneus or appearing after the flowers, plicate, long and narrow. Inflorescence lateral, simple or branched. Flowrs resupinate, variable in size and color. Sepals free, ± spreading. Labellum saccate or with a short spur, entire or 3-lobed, with crests on the upper surface. Column usually ± long, produced into a short foot or not, sometimes winged; anther terminal, incumbent, 2-celled; pollinia 2, ± cleft, waxy, attached to short, broad stipe with a discoid viscid gland; stigma entire. Ovary with a pedicel.