Habit: terrestrial herbs

Tuber: present, globose or ellipsoid

Stem: with leaves

Leaf: characteristics: 1, petiolate

Leaf: position: basal

Leaf: shape: elliptic, spatulate

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Floral bract: scalelike

Flower: other characteristics: resupinate

Sepal: free or similar, dorsal sepal connivent with petals forming a hood

Labellum: not lobed

Anther: 2-loculed

Stigma: 2

Rostellum: with 2 arms

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