Apples and Pears
Pomaceous fruit is fruit, the seeds of which are contained in a pocket of skin. Those seeds are in a ‘core’. The fruits are hard, which is why they are sometimes referred to as hard fruit. Apples and pears are 'hard' fruit.
Citrus fruit includes oranges, lemons, mandarins, grapefruits, etc. The skin consists of very many oil glands. The edible inner part contains a lot of sugars, organic acids and vitamin C.
Some tropical fruits are relatively unknown in Europe (Pitaya, khaki), while others have become mainstream (banana). Exotic fruit comes mostly from (sub-)tropical regions.
Stone fruits are fleshy fruits with a hard core or kernel inside. This fruit is sweet and juicy and is available mainly in summer. Stone fruits come in many shapes and sizes and in various colours.