The Black mulberry (Morus nigra) belongs to Moraceae (the Mulberry family). It is a tall deciduous tree that is speculated to originate from southwestern Asia. It spread to Greece and Rome, and then to other parts of Europe. It grows 6-9 m in height, slender but with numerous branches. The leaves are rough on upper surfaces and pubescent underneath, 10-20 cm long, often producing leaves of several different shapes, with 1 or more lobes, multilobed leaves often appearing on the same branches as lobeless ones. The fruit is a compound cluster of several small drupes that are dark purple, almost black when ripe, and they are 2.5 cm in diameter. It is grown mainly for its fruits or as an ornamental specimen tree. In Japanese, it is called "黒実桑" (kuromi-guwa).