Description from Flora of China
Herbs, terrestrial. Stems erect. Leaves alternate, sessile to subsessile, gradually decreasing in size upward, pinnately parted, 1-veined. Flowers solitary in leaf axils or in racemes. Bracteoles 2. Calyx campanulate, 5-lobed. Corolla small, obscurely 2-lipped; lower lip longer than upper lip, 3-lobed, lobes spreading flat; upper lip straight, 2-lobed. Stamens 4, somewhat didynamous, included; anther locules 2, distinct, base mucronate. Style slender; stigma inconspicuous, apex acute. Capsule globose, sometimes compressed, as long as or shorter than calyx, base rounded, apex truncate or emarginate, 4-valved. Seeds numerous, pyramidal to oblong; seed coat reticulate.
Two species: Cambodia, China, Laos, Thailand; both in China.