Habit: saprophytic herbs

Rhizome: with tufted roots, with fleshy roots

Stem: sheathing below middle, without leaf

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Flower: other characteristics: resupinate

Sepal: free or similar

Petal: shorter or smaller than sepals

Labellum: 2-lobed

Stigma: concave, liplike protruding

Rostellum: ligulate or ovate or U-shaped or deltoid, spreading horizontally or suberect

Pollinia: number: 2

Pollinia: other characteristics: granular-farinaceous, neither caudicle nor viscidium