Leaf: shape: lanceolate, lanceolate-oblong

Petiole: present

Inflorescence: raceme, lax, terminal

Calyx: tubular, apex 2-lobed or 2-toothed, apex 3-lobed or 3-toothed, split on 1 side, campanulate or turbinate

Corolla: apex dilated, campanulate

Corolla lobes: central lobe longer and wider than lateral lobes

Labellum: obovate or tongue-shaped

Filament: short or absent

Anther: linear or oblong

Ovary: 3-loculed basally, 1-loculed apically

Fruit: cylindric or oblong, torulose