ebony, common name for members of the Ebenaceae, a family of trees and shrubs widely distributed in warmer climates and in the tropics. The principal genus, Diospyros, includes both ebony and persimmon trees. Ebony wood, valued from ancient times, is hard and dark; it is extensively used for piano keys and in cabinetmaking, especially the black Macassar ebony of India and the East Indies. Several species (notably D. hirsuta ) that have wood striped with black or with shades of brown are called calamander wood or variegated ebony. Several other unrelated hardwoods are commonly called ebony. Of the many species in the family bearing edible fruit, the best known are the persimmons. D. virginiana is native in the United States E of the Mississippi. The Japanese persimmon ( D. kaki ) is cultivated in Japan and China, in the Mediterranean area, and in the warmer regions of the United States. The unripe fruit contains tannic acid, a powerful astringent. Soft and pulpy when ripe, persimmons are difficult to market. Large quantities are eaten on the tree by opossums, whence the name possumwood for the tree. Persimmon wood has a limited use in the manufacture of objects (e.g., golf club heads) requiring hard wood. The ebony family is classified in the division Magnoliophyta, order Ebenales, class Magnoliopsida.