Habit: epiphytic herbs

Rhizome: retrose or transverse or creeping or ascending

Pseudobulb: with leaves

Leaf: characteristics: 1

Inflorescence: type: raceme

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

Sepal: free or similar

Petal: shorter or smaller than sepals

Labellum: 3-lobed, adnate to column, not lobed

Column: with column foot, without column foot

Anther: 2-loculed

Rostellum: 2-lobed or beaked

Pollinia: number: 4

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