Habit: epiphytic herbs

Rhizome: retrose or transverse or creeping or ascending

Leaf: position: in two rows

Floral bract: small

Scape: emerging from center of leaves or pseudobulb base or rhizome

Sepal: free or similar

Petal: free, narrower than sepals or as long as dorsal sepal

Labellum: 3-lobed, 2-lobed

Stigma: concave

Pollinia: number: 4

Pollinia: other characteristics: without caudicle