Pseudostems slender. Leaves shortly petiolate; leaf blade cordate or subsagittate at base. Inflorescence a terminal spike; bracts and bracteoles present. Calyx tubular or clavate, split on 1 side, apex 2-or 3-toothed. Corolla tube cylindric, longer than calyx; lobes lanceolate, central one larger than lateral ones. Lateral staminodes absent. Labellum erect, narrowly spatulate, base adnate to filament or not, apex 2-cleft or-lobed. Filament exserted from corolla, distally grooved. Style filiform; stigma cupular, ciliate. Ovary 3-loculed; ovules numerous, biseriate; placentation axile. Capsule subglobose or ellipsoid, 3-valved, dehiscent or not; pericarp thin.
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