 The definitive characteristic of a drupe is that the hard, "lignified" stone (or pit, as in a peach) is derived from the ovary wall of the flower.In an aggregate fruit, which is composed of small, individual drupes (such as a raspberry), each individual is termed a drupelet, and may together form an aggregate fruit, although not classifying botanically as a berry.Other fleshy fruits may have a stony enclosure that comes from the seed coat surrounding the seed, but such fruits are not drupes.