Habit: epiphytic herbs

Stem: with leaves, with scalelike sheath or roots

Leaf: characteristics: sheathing or noding at base, apex notched or acute or obtuse or hooked, base clasping

Leaf: position: in two rows

Leaf: shape: base V-shaped

Inflorescence: position: laterally on stem

Sepal: free or similar

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

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, with slit

Stipe: shape: tapelike