Habit: terrestrial herbs, epiphytic herbs

Rhizome: with tufted roots

Inflorescence: type: raceme

Inflorescence: other characteristics: rachis pubescent or zigzagged flexuose or winged

Sepal: free or similar

Petal: base connivent to sepals or with claw

Labellum: with sac or spur or auricles at base, 3-lobed, not lobed

Column: without column foot

Pollinia: number: 2

Pollinia: other characteristics: with caudicle or viscidium, with stipe

Stipe: shape: oblanceolate