Habit: terrestrial herbs

Rhizome: retrose or transverse or creeping or ascending, noded, cylindrical

Stem: with leaves, leafy

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Flower: other characteristics: resupinate

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

Labellum: with sac or spur or auricles at base

Anther: 2-loculed

Stigma: 2

Pollinia: number: 2

Pollinia: shape: obovate

Pollinia: other characteristics: granular-farinaceous, without caudicle