Shrubs or perennial herbs, with cystoliths. Leaves petiolate; leaf blade margin entire or sinuate-crenate. Inflorescences axillary or terminal, thyrsoid racemes; bracts and bracteoles narrow. Calyx deeply 5-lobed, lobes narrow. Corolla putatively resupinate (apparently by geniculation rather than torsion); tube long, geniculate, apically widened; limb 2-lipped; lower lip slightly recurved, much broader than upper lip, 3-lobed; upper lip shortly 2-lobed; lobes ascending cochlear in bud. Stamens 2; anthers 1-thecous, base muticous; staminodes absent. Stigma shortly 2-cleft. Capsule oblong, with a short basal stalk, 4-seeded; retinacula present.

Three species: tropical Asia; one species in China.

(Authors: Hu Jiaqi (胡嘉琪 Hu Chia-chi), Deng Yunfei (邓云飞); Thomas F. Daniel)