Litchi is a nut type simple fruit. When a single fruit develops from a single ovary of a single flower, it is called a simple fruit. An aril which is a specialized outgrowth from a seed that partly or completely covers the seed is the edible part of litchi. In custard apple, the berries become very fleshy and being crowded together on a thick thalamus form a complex single fruit. the mesocarp, i.e. the fleshy part is the edible part of custard apple. Pomegranate is a balausta which is a berry with an outer hard rind formed of epicarp and a part of mesocarp. Succulent testa is the edible part of pomegranate. A citrus fruit is berry called a hesperidium that has a thick, leathery rind, with numerous oil glands (juicy placental hair), and a large flesh portion composed of several wedge-shaped sections.