Annona muricata is a member of the family of custard apple trees called Annonaceae and a species of the genus Annona known mostly for its edible fruits. Annona muricata produces a fruit that is usually called soursop due to its slightly acidic taste when ripe. A. muricata trees are native to the Caribbean and Central America but are now widely cultivated in tropical climates throughout the world. Small, upright, evergreen tree that can grow to about 4 meters (13 ft.) tall. Dark green, prickly (or bristled) fruits are egg-shaped and can be up to 30 centimeters (12 in) long,with a moderately firm texture. Flesh is juicy, acid, whitish and aromatic. There are many varieties of soursop cultivated throughout its range. Generally varieties are selected for sweetness, acidity, and pulp texture. Soursops are eaten straight from the tree, can be juiced, are popular as flavorings in ices and popsicles, and are occasionally made into a custard with sugar and milk.