Habit: epiphytic herbs

Stem: sheathing above middle, noded

Leaf: characteristics: sheathing or noding at base, margin recurved or apex lobed

Leaf: position: in two rows

Leaf: shape: cylindric

Inflorescence: type: raceme, panicle

Inflorescence: position: laterally on stem

Sepal: lateral sepals adnate to column foot or labellum forming a mentum

Petal: similar to sepals

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

Column: with column foot

Pollinia: number: 2

Pollinia: shape: globose or subglobose

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

Viscidium: other characteristics: wider than stipe