what is a drupe

A drupe is a type of fruit in botany that usually contains a single seed. It is an indehiscent fruit, meaning it does not split open when ripe. The fruit has an outer fleshy part that surrounds a single shell of hardened endocarp with a seed inside. The hard, lignified stone is derived from the ovary wall of the flower, and the pit usually has one seed or, rarely, two or three, in which case only one develops fully. The three layers of a drupe are the exocarp (outer layer), the mesocarp (fleshy middle layer), and the endocarp (hard, woody layer that surrounds the seed). Examples of drupes include peaches, plums, cherries, olives, mangoes, and almonds.