Herbs or vines, sometimes woody. Leaves petiolate, the stipules small, per-sistent. Inflorescences axillary, cymose, occasionally terminal, the flowers oc-casionally solitary. Flowers variable in color, the calycine lobes usually 4, short or long, usually with teeth or small glands between the lobes; corolla tubular or funnel shaped, 4-lobed; anthers exserted or included; ovary 2-celled, the ovules numerous. Fruits capsular, obovoid or turbinate, septicidally bivalvate, splitting from the apex; seeds compressed, winged.
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