Habit: terrestrial herbs

Stem: tufted or separate, sheathing below middle, noded

Leaf: characteristics: several to many, plicate or plicate-venous, sheathing or noding at base, base clasping

Leaf: position: alternate

Scape: arising laterally on pseudobulb or base of short stem or nodes of rhizome

Flower: other characteristics: spreading, pendulous

Sepal: free or similar, lateral sepals spreading or oblique or reflexed or connivent

Petal: similar to sepals, free

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

Rostellum: ligulate or ovate or U-shaped or deltoid

Operculum: ovate-cordate

Pollinia: number: 8

Pollinia: shape: obovate

Pollinia: other characteristics: with caudicle or viscidium

Viscidium:shape: peltate