Herbs or small suffrutescent shrubs, annual or perennial, sometimes creeping. Leaves usually small, ovate to almost linear, entire. Flowers axillary, pedunculate, 1 to several-flowered dichasia or solitary, pedicellate or sessile in the leaf axils. Sepals free, equal or subequal. Corolla rotate, campanulate, funnel-shaped or salverform, the limb mostly entire, the folds pilose outside. Styles 2, free or basally united, each style deeply bifid for at least half its length, stigmas long, terete, filiform to subclavate. Fruits capsular, globose to ovoid. Seeds small, smooth or minutely verrucose.