Rhizome: tuberous

Leaf: Position: Basal, Cauline

Leaf: shape: oblong, lanceolate

Leaf: other characteristics: ligule 2-lobed

Petiole: present

Bracts or bracteoles: more flowered or 2-ranked and subtending 1 bracteole and 1 flower

Inflorescence: terminal, arising from pseudostems

Calyx: tubular

Corolla: corolla tube exserted from calyx

Labellum: oblong or spatulate, obovate or tongue-shaped, entire, apex lobed or cleft or concave or emarginate, larger or longer than corolla lobes

Stamens or staminodes: stamen shorter than labellum, petaloid

Filament: erect

Anther: locules parallel, dehiscing by slits or apical pores, base without spur

Ovary: 3-loculed, placentation axile

Fruit: cylindric or oblong, 3-valved

Seed: aril laciniate