Shrubs. Leaves opposite, simple or 3-lobed. Cymes usually axillary, with monochasial branches. Flowers minute. Calyx campanulate, minutely 5-dentate or subtruncate. Corolla 2-lipped, lower lip 3-lobed, upper lip usually 2-lobed, lobes entire. Stamens didynamous, shorter or longer than corolla. Ovary 2-locular when young, becoming 4-locular; ovules 1 per locule. Stigma 2-cleft. Fruiting calyx inflated. Schizocarp globose, reticulately ridged, breaking into 4 mericarps each enclosing 1 seed.

One or two species: SE Asia, one species in China.