Habit: terrestrial herbs

Tuber: present, globose or ellipsoid

Stem: with leaves

Leaf: characteristics: sheathing or noding at base, base clasping

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Floral bract: leaflike

Sepal: free or similar

Labellum: with sac or spur or auricles at base, adnate to column

Anther: 2-loculed

Pollinia: number: 2

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