Habit: terrestrial herbs

Rhizome: retrose or transverse or creeping or ascending, noded

Stem: leafy

Leaf: characteristics: petiolate

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Flower: other characteristics: resupinate

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

Labellum: with sac or spur or auricles at base, 3-partite, adnate to column

Column: with wing or triangular-falcate or arm-shaped or subulate appendages

Anther: 2-loculed

Stigma: convex, 2

Rostellum: 2-lobed or beaked

Pollinia: number: 2

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