Description from Flora of China
Herbs, perennial, epipetric, rhizomatous, stemless. Leaves few, basal; leaf blade puberulent to pilose, base cordate. Inflorescences lax, axillary, 2-5-flowered cymes; bracts 2, opposite. Calyx actinomorphic, 5-sect from base; segments equal. Corolla purple to rose, zygomorphic, inside glabrous; tube oblique, campanulate, not swollen, shorter than limb, ca. 3.5 mm in diam.; limb 2-lipped; adaxial lip 4-lobed, slightly shorter than abaxial lip; abaxial lip undivided, apex acute. Stamens 2, adnate to abaxial side of corolla tube near base, included; anthers dorsifixed, coherent by adaxial surfaces, thecae divaricate, confluent at apex, dehiscing longitudinally; connective not projecting; staminodes 2, adnate to adaxial side of corolla tube. Disc ringlike. Ovary nearly oblong, 1-loculed; placentas 2, parietal, projecting inward, 2-cleft. Stigma 1, terminal, depressed-globose, undivided. Capsule straight in relation to pedicel, linear, much surpassing calyx, dehiscing loculicidally to base; valves 4, straight, not twisted. Seeds unappendaged.
* One species: endemic to China.
Burtt (pers. comm.) has suggested that there is another, as yet undescribed, species from Vietnam.