Habit: epiphytic herbs

Stem: branched, unbranched, with scalelike sheath or roots

Leaf: characteristics: 1

Inflorescence: position: terminal or subterminal

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

Petal: narrower than sepals or as long as dorsal sepal

Labellum: 3-lobed, not lobed

Column: with column foot

Pollinia: number: 8

Pollinia: other characteristics: with caudicle or viscidium