Graviola annona muricata also known as soursop is a small evergreen tree with large dark green glossy leaves that is native to the amazon rainforest and other tropical areas of the americas it produces a large heart shaped edible fruit that is 15 to 23 cm in diameter is yellow green in colour and has a white flesh in brazil the juice is a popular drink and is known as guanbana many active compounds have been found in all parts of the plant including the leaf bark root stem