Habit: epiphytic herbs

Rhizome: retrose or transverse or creeping or ascending

Pseudobulb: with internode, with sheath

Leaf: characteristics: 1, 2, sessile or subsessile, petiolate

Leaf: shape: ovate, elliptic

Floral bract: membranous

Flower: other characteristics: solitary

Sepal: free or similar, lateral sepals adnate to column foot or labellum forming a mentum, lateral sepals spreading or oblique or reflexed or connivent

Petal: narrower than sepals or as long as dorsal sepal

Labellum: adnate to column

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

Pollinia: number: 4

Pollinia: other characteristics: neither caudicle nor viscidium