Shrubs. Leaves discolorous, margins undulate crenate. Flowers solitary, in leaf axils; pedicel longer then the corresponding petiole. Epicalyx absent. Calyx margins undulate crenate or pinnately divided, costae 0-3, often obscured by dense indumentum. Corolla large, pink or lavender, assymetrical, striated. Staminal column included, stameniferous at apex. Styles 5-8, stigmas clavate, stigmatic zone bilaterally decurrent. Fruits schizocarpic. Mericarps 5-8, apex aristate, dehiscent ventrally and apically, 2-3 seeds per mericarp. Endoglossum absent.