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
Fruit in which part or all of the "pericarp" (fruit wall) is fleshy at maturity are "simple fleshy fruits". Types of simple, fleshy, fruits (with examples) include: An aggregate fruit, or "etaerio", develops from a single flower with numerous simple pistils. The pome fruits of the family Rosaceae, (including apples, pears, rosehips, and saskatoon berry) are a syncarpous fleshy fruit, a simple fruit, developing from a half-inferior ovary. Schizocarp fruits form from a syncarpous ovary and do not really dehisce, but rather split into segments with one or more seeds; they include a number of different forms from a wide range