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Bombacaceae A family of trees, closely related to Malvaceae, in which the trunk is often stout, and the leaves often palmately compound (see PALMATE) and usually scaly. The flowers are often large, and hermaphrodite. They have 5 sepals and petals, usually partly united, numerous free stamens, and a superior ovary of 2–5 fused carpels. The fruit is a big, woody capsule, often spiny, or tessellated. There are 30 genera, with about 250 species, distributed in the tropics.