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Dilleniaceae, family of flowering plants (order Dilleniales), with 11 genera and about 300 species of trees, shrubs, and woody vines (or rarely herbs) of the tropics and subtropics. A number of species, especially those in the genus Hibbertia, are used as ornamentals. Taxonomically, Dilleniaceae has had a checkered history. It was formerly considered to be an evolutionary link between the more “primitive” Magnoliales (the magnolia order) and several more “advanced” orders such as Theales (the...