Habit: terrestrial herbs

Tuber: present

Stem: sheathing below middle

Leaf: characteristics: base clasping

Leaf: position: alternate, opposite or subopposite, basal, rosette or cauline

Inflorescence: type: raceme

Inflorescence: position: terminal or subterminal

Floral bract: lanceolate or ovate

Flower: other characteristics: resupinate, secund

Sepal: free or similar, concave

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

Anther: 2-loculed

Stigma: concave, 1

Rostellum: with 2 arms

Pollinia: number: 2

Staminode: 2

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

Fruit:type: capsule

Fruit: other characteristics: erect