The Perisperm and the Endosperm are the two types of food storage tissues found in Angiosperms. The perisperm is the diploid tissue (2n) derived from the nucellus or the body of the ovule and is found in certain angiosperms. On the other hand, endosperm in Angiosperms is triploid tissue and is derived from triple fusion.
In some seeds, the endosperm persists in the seed as a food storage tissue. The endosperm is not entirely consumed during embryo development, and it is the nourishing tissues in seeds. Such seeds are called endospermic or albuminous, e.g., castor, maize, wheat, barley, rubber, coconut.