Habit: terrestrial herbs

Rhizome: with tufted roots, with fleshy roots

Stem: sheathing below middle, noded

Leaf: characteristics: plicate or plicate-venous, sheathing or noding at base

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal, arising from leaf axil

Inflorescence: other characteristics: unbranched

Flower: other characteristics: distichously arranged

Sepal: free or similar

Petal: similar to sepals, free

Labellum: with sac or spur or auricles at base

Rostellum: 2-lobed or beaked

Pollinia: number: 2

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