Who is Custard apple's cousin?

The custard-Apple, also called bullock's heart or bull's heart, is the fruit of the tree Annona reticulata. This tree is a small deciduous or semi-evergreen tree sometimes reaching 10 metres (33 ft) tall and a native of the tropical New World that prefers low elevations, and a warm, humid climate. It also occurs as feral populations in many parts of the world including Southeast Asia, Taiwan, India, Australia, and Africa.[citation needed] The fruits are variable in shape, heart shaped, oblong or irregular. The size ranges from 7 centimetres (2.8 in) to 12 centimetres (4.7 in). When ripe, the fruit is brown or yellowish, with red highlights and a varying degree of reticulation, depending on variety. The flavor is sweet and pleasant. In some regions of the world, "custard-Apple" is another name for sugar-Apple or sweetsop (Annona squamosa), a different plant in the same genus. In Britain, "custard-Apple" refers to cherimoya, the fruit of Annona cherimola, a third plant in the same genus.