Habit: terrestrial herbs, epiphytic herbs

Stem: noded

Leaf: characteristics: several to many, sheathing or noding at base, base clasping

Leaf: position: distichous

Inflorescence: type: raceme

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

Column: with column foot

Rostellum: 2-lobed or beaked

Pollinia: number: 6

Pollinia: other characteristics: with caudicle or viscidium