Flowers 4-to 5-merous. Hypanthium campanulate to saucer-shaped, glabrous or thinly pubescent. Calyx spreading, truncate or with short or depressed lobes; exterior teeth none. Stamens 8 or 10, nearly or quite isomorphic; filaments flat-tened, glabrous; anthers subulate, straight or somewhat arcuate; connective bearing at base a large, inflated, usually rounded, dorsal appendage. Ovary free, 5-celled; style usually slender and elongate; stigma truncate or punctiform. Fruit a many seeded capsule. Trees or shrubs with broad, usually petiolate leaves and large, white to purple flowers in terminal or axillary panicles; leaf-margins often some-what dilated at base and more or less confluent over the petiole.
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