Habit: terrestrial herbs

Tuber: present

Stem: with leaves

Leaf: characteristics: 1, sessile or subsessile, sheathing or noding at base, base clasping

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Flower: other characteristics: resupinate

Sepal: free or similar

Petal: free, narrower than sepals or as long as dorsal sepal

Labellum: adnate to column, not lobed

Column: with wing or triangular-falcate or arm-shaped or subulate appendages

Anther: 2-loculed

Pollinia: number: 4

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