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DescriptionHerbaceous or woody climbers. Leaves petiolate, entire or lobed; base often cordate. Flowers in dense axillary cymes. Sepals 5. Corolla urceolate, constricted at apex of the tube; limb shortly 5-lobed. Stamens borne low down in the corolla tube, widened basally into large concave scales, arching over the ovary. Ovary 2-locular. Style 1; stigmas 2 or 1 2-lobed. Capsule 4-valved or almost indehiscent.