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Annona (family Annonaceae) A genus of shrubs or small trees, producing large fruits that are aggregate, individual berries being immersed in the fleshy receptacle. Many are edible—e.g. neotropical A. muricata (soursop), A. reticulata (bullock's heart or custard apple), A. cherimola (cherimoya or custard apple), and A. squamosa (sweetsop, custard apple, or sugar apple). There are about 100 species, occurring in the warm temperate to tropical regions of Africa and America.