Habit: terrestrial herbs, epiphytic herbs

Rhizome: retrose or transverse or creeping or ascending, noded

Stem: with leaves

Leaf: characteristics: petiolate

Leaf: position: alternate, tufted

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, concave, lateral sepals spreading or oblique or reflexed or connivent

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

Rostellum: 2-lobed or beaked

Pollinia: number: 2

Pollinia: other characteristics: granular-farinaceous, 2-parted

Fruit:type: capsule

Fruit:shape: elliptic