The Stokes Purple Sweet Potato is extremely high in antioxidants, similar to other Jamun fruit is botanically known as Syzygium cumini and is produced on an evergreen tree that reaches up to 20 feet tall. .. Mush Oyster King Trumpet USA. The tree was also introduced to Florida, USA in by the USDA, and is also now The various names for this fruit are (in Java) plum, jambul, jamun, jaman. Syzygium cumini, commonly known as jambolan, Java plum or black plum, is an evergreen tropical tree in the flowering plant family Myrtaceae. It is native to the Indian Subcontinent, adjoining regions of Southeast Asia, China and Queensland. The name of the fruit is sometimes mistranslated as blackberry, which is a For the dessert popular in Indian cuisine, see Gulab Jamun.