Fruit anatomy forms the edible tissue around the seeds. In other fruits such as "Citrus" stone fruits ("Prunus") only some layers of the pericarp are eaten. In accessory fruits, other tissues develop into the edible portion of the fruit instead, for example the receptacle of the flower in strawberries. In fleshy fruits, the pericarp is typically made up of three distinct layers: the epicarp (also known as exocarp), which is the outermost layer; the mesocarp, which is the middle layer; and the endocarp, which is the inner layer surrounding the ovary or the seeds. In a citrus fruit, the epicarp and mesocarp
Aggregate fruit make a larger fruit. Aggregate fruits may also be accessory fruits, in which parts of the flower other than the ovary become fleshy and form part of the fruit. The individual parts of an aggregate fruit come in many forms. Common examples are: The components of other aggregate fruit are more difficult to define. For example, sugar apple ("Annona" spp.) fruit are made up of individual berry-like pistils fused with the receptacle. Aggregate fruit An aggregate fruit or etaerio () is a fruit that develops from the merger of several ovaries that were separate in a single flower. In contrast,