Habit: terrestrial herbs

Tuber: present, globose or ellipsoid, not lobed, its neck with roots

Stem: with leaves

Leaf: characteristics: 1, several to many

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Flower: other characteristics: resupinate

Sepal: free or similar

Petal: narrower than sepals or as long as dorsal sepal

Labellum: with sac or spur or auricles at base, adnate to column

Anther: 2-loculed

Stigma: 2

Pollinia: number: 2

Staminode: 2

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

Fruit:type: capsule

Fruit:shape: oblong

Fruit: other characteristics: erect