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Dilleniaceae A family of trees, shrubs, and herbs, in which the leaves are simple, without stipules. The flowers are showy and hermaphrodite, with free, imbricate sepals and petals, usually many stamens, and a superior ovary of 1 to many, usually free carpels. The fruit may or may not be dehiscent and is subtended by the persistent calyx. The seeds are sometimes arillate. There are 12 genera, with about 300 species occurring in the Old and New World tropics and subtropics, and well represented in Australia.