Description from Flora of China
Herbs, perennial, epipetric or terrestrial, rhizomatous, stemless. Leaves many, basal; leaf blade puberulent to villous, tomentose, or glabrescent, base narrowly cuneate to cordate. Inflorescences cymes, rarely umbel-like, lax or rarely dense, axillary, 2- to many flowered; bracts 2(or 3), opposite, rarely whorled. Calyx actinomorphic, 5-sect from base; segments equal. Corolla white to purple or pink, rarely yellow, zygomorphic, rarely actinomorphic, inside glabrous or sparsely puberulent, rarely pilose on lobes; tube campanulate, cylindric, rarely urceolate or salverform, not swollen, 1-4 X longer than limb, 3-11 mm in diam.; limb slightly 2-lipped; adaxial lip 2-lobed from near middle, shorter than to nearly equalling abaxial lip; abaxial lip 3-sect from base, lobes equal or subequal, apex rounded, sometimes crenulate. Stamens 4, adnate to corolla tube near base, rarely to or above middle, included; anthers basifixed, coherent in pairs, rarely free, thecae divergent at base, not or rarely confluent at apex, dehiscing longitudinally from arcuate slits; connective not projecting; staminode 1, adnate to adaxial side of corolla tube. Disc ringlike. Ovary narrowly oblong to oblong or ovoid, 1-loculed; placentas 2, parietal, projecting inward, 2-cleft. Stigmas 2, equal, oblate, undivided. Capsule straight in relation to pedicel, narrowly oblong to oblanceolate, much longer than calyx, dehiscing loculicidally to base; valves 2, straight, not twisted. Seeds unappendaged.
* Fourteen species: endemic to China.