General: Pseudostem leafy

Rhizome: tuberous

Leaf: shape: elliptic-oblong, oblong-lanceolate

Petiole: present, absent

Bracts or bracteoles: bracteoles present

Inflorescence: spike, terminal

Calyx: tubular, apex 3-lobed or 3-toothed, split on 1 side

Corolla lobes: central lobe longer and wider than lateral lobes

Labellum: reduced to a tooth or absent

Stamens or staminodes: lateral staminode absent or very short

Filament: exserted from or above corolla, distally grooved, boat-shaped

Anther: locules parallel

Connective: without appendage

Ovary: 3-loculed, ovules many per locule

Style: stylodes 2, filiform or linear