Habit: epiphytic herbs

Stem: with leaves

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

Leaf: position: distichous

Leaf: shape: oblong

Inflorescence: position: arising from leaf axil

Inflorescence: other characteristics: branched, unbranched

Flower: other characteristics: spreading

Petal: similar to sepals

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: 4

Pollinia: shape: globose or subglobose

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

Viscidium:shape: orbicular or suborbicular

Viscidium: other characteristics: as wide as stipe