Description from Flora of China
Shrubs or small trees, erect; branchlets, petioles, and peduncles rust colored tomentose when young. Leaves opposite, simple, lobed, or palmately 3-foliolate; petiole long. Cymes axillary, lax, few flowered; peduncle shorter than petioles. Calyx small, campanulate, 2-lipped, lower lip 2-lobed, upper lip entire, outside glandular. Corolla weakly 2-lipped, with elongated tube, throat not bearded but with a ring of minute hairs near base; lobes 4 or 5, subequal, much shorter than tube. Stamens 4, didynamous, inserted at middle of corolla tube, slightly exserted. Ovary 2-locular; ovules 1 or 2 per locule. Style elongate; stigma slightly 2-cleft.
Monotypic: China, Myanmar, and Vietnam.