Herbs, perennial, epipetric, rhizomatous, stemless or short and simple stemmed. Leaves few, basal or crowded above; leaf blade villous, base rounded to cordate. Inflorescences lax, axillary, 1-3-flowered cymes; bracts 2, opposite. Calyx actinomorphic, 5-sect from base; segments equal. Corolla white, zygomorphic, inside glabrous; tube tubular-funnelform, slightly gibbous abaxially toward limb, much longer than limb, 1.2-1.5 cm in diam.; limb 2-lipped; adaxial lip 2-lobed, slightly shorter than abaxial lip; abaxial lip 3-lobed, lobes subequal, apex rounded. Stamens 4, adnate to corolla tube below middle, included; anthers basifixed, coherent in pairs, thecae subparallel, not confluent, dehiscing longitudinally; connective not projecting; staminode 1, adnate to adaxial side of corolla tube. Disc ringlike. Ovary oblong, 2-loculed, only adaxial locule fertile; placenta 1, axile. Stigmas 2, equal, obovate, undivided. Capsule oblique in relation to pedicel, oblong, much longer than calyx, dehiscing loculicidally to above base; valves 2, straight, not twisted. Seeds unappendaged.

* One species: endemic to China.