Rhizome: retrose or transverse or creeping or ascending, noded, with tufted roots

Leaf: characteristics: 1, petiolate

Inflorescence: type: raceme

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

Sepal: lateral sepals adnate to column foot or labellum forming a mentum

Petal: shorter or smaller than sepals

Labellum: 3-lobed, pandurate or trumpet-shaped, adnate to column

Column: with wing or triangular-falcate or arm-shaped or subulate appendages, with column foot

Pollinia: number: 4

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