Description from Flora of China
Herbs, perennial, epipetric or terrestrial, rhizomatous, stemless. Leaves few, basal; leaf blade puberulent to pubescent, base cordate. Inflorescences lax, axillary, 5- to many-flowered cymes; bracts 2, opposite. Calyx actinomorphic or slightly zygomorphic, 5-sect from base, 2-5-lobed, or 2-lipped; segments equal to unequal. Corolla purple to reddish, zygomorphic, inside glabrous; tube broadly tubular, not swollen, nearly equalling limb, 3.5-4 mm in diam.; limb 2-lipped; adaxial lip undivided; ca. 1/2 X length of abaxial lip; abaxial lip 3-lobed, lobes equal, apex rounded, rarely obtuse. Stamens 2, adnate to abaxial side of corolla tube near base or rarely above middle, 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 linear, 1-loculed; placentas 2, parietal, projecting inward, 2-cleft. Stigma 1, terminal, capitate, undivided. Capsule straight in relation to pedicel, linear, much surpassing calyx, dehiscing loculicidally to base; valves 2, straight, not twisted. Seeds unappendaged.
* Four species: endemic to China.