Habit: epiphytic herbs

Stem: with leaves

Leaf: position: alternate, distichous

Inflorescence: type: raceme

Inflorescence: position: laterally on stem

Petal: similar to sepals

Labellum: with sac or spur or auricles at base, 3-lobed, adnate to column

Column: with column foot

Pollinia: number: 4

Pollinia: shape: globose or subglobose

Pollinia: other characteristics: with caudicle or viscidium, with stipe

Viscidium:shape: saddlelike or luniform

Fruit:type: capsule

Fruit:shape: cylindrical