Caryopsis is a kind of a simple fruit in which the pericarp is fused inseparably to the testa of the seed.
Caryopsis is commonly found in
Cereals
The grains of cereals, such as wheat and maize, are monocarpelate, i.e., it is made of a single carpel. Also, these grains are fruits as well as seeds combined together in such a way that the pericarp of the fruit is fused with the testa of the seed.