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Lianas or scandent shrubs. Leaves opposite, often with translucent dots. Cymes terminal or axillary, forked, sessile or short pedunculate. Flowers small. Sepals ciliate at margin; basal glands usually absent. Corolla subrotate; tube short; lobes erect patent, overlapping to right. Corona usually double, outer lobes 5, reduced to longitudinal ridges below corolla lobe sinus; inner lobes 5, inserted on gynostegium, usually laterally compressed, straight or incurved. Filaments free or connate at base; anthers with short, incurved apical appendages; pollinia minute, 4 per pollinarium, erect, globose to ellipsoid, retinaculum minute, translator arm absent. Ovaries glabrous. Stigma head capitate or short conical. Follicles terete, smooth. Seeds ovate.
