Graviola, also known as soursop, guanabana, or Brazilian Paw Paw, is an evergreen tree found in tropical areas of North and South America. The heart-shaped fruit, along with leaves, roots, and stems, has been used in traditional herbal medicine in native cultures for many years. Graviola is a fruit tree native to North and South America and the Caribbean, where it is known by such names as Paw-Paw, Soursop, and Guanabana. The species native to South America is the Guanabana tree, and it is prized for its fruit, which is used in drinks, ice cream, and marmalades. Graviola is a small, upright evergreen tree growing 5 to 6 meters in height with large dark green and glossy leaves. It is indigenous to most of the warmest tropical areas in South and North America including the Amazon. read more..