The Clusiaceae is a family of trees and shrubs containing about 50 genera and 1200 species. It was formerly known as the Guttiferae, and is commonly called the mangosteen family. The family name honors the celebrated French botanist Carolus Clusius, aka Charles de l'Écluse. The family is widespread in the tropics and in northern temperate regions. The large genus Hypericum or St. John's worts is in a sub-family that is sometimes treated as a family of its own. The leaves are opposite or whorled, simple, usually entire and often glandular-punctate. The flowers have 4-5 sepals, 4-6 petals and 9-many stamens. The fruit is usually a capsule or a berry. Tropical members of the family produce lumber, drugs, dyes and gums and edible fruits such as the mangosteen. Many species contain a milky sap. Other members of the order Malpighiales include violets, willows, mangroves, flax and passion-fruit.