Habit: epiphytic herbs

Stem: noded

Leaf: characteristics: sheathing or noding at base, apex notched or acute or obtuse or hooked, margin recurved or apex lobed, base clasping, resupinate

Leaf: position: in two rows

Inflorescence: position: laterally on stem

Flower: other characteristics: spreading

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

Column: without column foot

Rostellum: 2-lobed or beaked

Pollinia: number: 2

Pollinia: shape: globose or subglobose

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

Stipe: shape: linear, spatulate or subspatulate

Viscidium: other characteristics: wider than stipe