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DescriptionLianes or climbing shrubs, less often small trees. Stipules free or ± united. Inflorescence of various forms, axillary. Bracts persistent. Flowers bisexual. Sepals (4-)5. Petals (4-)5(-6), green to white or yellow. Leaves opposite or subopposite, petiolate. Disk present, varying in shape. Stamens (2-)3(-4). Ovary superior, 3-locular. Stigmas 3. Fruit of 3 capsular, flattened mericarps, united at the base. Seeds usually winged.