Habit: terrestrial herbs

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

Stem: with leaves

Leaf: characteristics: 1

Leaf: position: basal, rosette or cauline

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Floral bract: lanceolate or ovate

Flower: other characteristics: resupinate, secund

Sepal: free or similar, 1-veined

Petal: broader than sepals

Labellum: with sac or spur or auricles at base, 3-lobed

Anther: 2-loculed

Stigma: 2

Rostellum: with 2 arms

Pollinia: number: 2

Staminode: 2

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

Fruit:type: capsule

Fruit: other characteristics: erect