Cleistogamous flowers are found in

Cleistogamous flowers are found in Arachis hypogea.
Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers.
The principal advantage of cleistogamy is that it requires fewer plant resources to produce seeds than does chasmogamy because the development of petals, nectar and large amounts of pollen is not required.