Habit: terrestrial herbs

Rhizome: retrose or transverse or creeping or ascending, with fleshy roots

Pseudobulb: ovoid or elliptic or spindle-shaped or ovate or conical, with leaves, with internode, with sheath

Leaf: characteristics: 1, plicate or plicate-venous, sheathing or noding at base, petiolate

Inflorescence: type: raceme

Floral bract: membranous

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

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

Petal: similar to sepals

Labellum: with sac or spur or auricles at base, 3-lobed, adnate to column, not lobed

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

Pollinia: number: 8

Pollinia: other characteristics: neither caudicle nor viscidium