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Mostly scandent herbs, occasionally suffrutescent, usually pubescent. Leaves opposite, generally cordate and long petiolate. Cymes usually umbellate, terminal or axillary, few-to several-flowered. Flowers with the calyx 5-lobed, with or without basal interior glands; corolla usually white, yellow, or purplish, cam-panulate to subglobose, the tube short, deeply 5-lobed, the lobes usually narrow, contorted in bud; stamens inserted near the base of the tube, the corona 5-parted,
adnate to the corolla or free, erect, the segments usually fleshy, ? retuse, emar-ginate or bifid, with or without interior appendages, the filaments forming a short tube, the anthers terminated by an inflexed membrane; pollinia pendulous, usually oblong, translators usually with strongly appendaged dorsal margins; stigma usually beaked, the beak frequently bifid. Follicles slender or thick-ened, smooth or tuberculate; seeds comose.
