Rhizome fleshy. Leaf shoots tall, usually many-bladed. Inflorescence borne separately on a leafless peduncle. Bracts large, imbricating, each subtending a single flower. Bracteoles open to the base. Calyx tubular, unilaterally split. Lateral staminodes adnate to the labellum, thus forming a 3-lobed structure. Filament short; anther connective prolonged into an elongated crest which embraces the upper part of the style.