Mulberry plants (Morus) have both been cultivated and grown wild in Europe and the Mid-east for many centuries. On most occasions, mulberry trees are identified by the fruit color it produces such as, red, black, white, or fruitless.
The white mulberry, Morus alba is native to Asia and has been imported to North America. In areas of the United States they are considered invasive because of their ability to naturalize and spread out quite easily. Red mulberries (Morus rubra) produce red colored berries that eventually turn black or dark purple when ripe. Morus rubra is grown quite extensively in many areas of the US because of their hardiness, fast growth, and desired fruits.
Fruitless mulberries are grafted trees that do not produce fruit but are very attractive, hardy, and long-lived plants that fit in many yards and landscapes. Besides being grown for its fruits, mulberry leaves are important in silk production by silkworms and food coloring from the mulberry fruit juices.