Habit: epiphytic herbs

Stem: branched, unbranched, noded

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

Leaf: shape: base V-shaped

Inflorescence: type: raceme, panicle

Sepal: free or similar

Petal: shorter or smaller than sepals

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

Column: with wing or triangular-falcate or arm-shaped or subulate appendages, without column foot

Rostellum: 2-lobed or beaked

Pollinia: number: 4

Pollinia: shape: globose or subglobose

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

Viscidium: other characteristics: wider than stipe