Habit: terrestrial herbs

Rhizome: retrose or transverse or creeping or ascending, noded

Stem: with leaves

Leaf: characteristics: petiolate

Leaf: position: alternate

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Flower: other characteristics: resupinate

Sepal: free or similar, dorsal sepal connivent with petals forming a hood, concave, lateral sepals spreading or oblique or reflexed or connivent

Petal: narrower than sepals or as long as dorsal sepal

Labellum: with sac or spur or auricles at base, twisted

Anther: 2-loculed

Rostellum: twisted

Pollinia: number: 2

Pollinia: shape: obovate

Pollinia: other characteristics: granular-farinaceous, with caudicle or viscidium