Albuminous seeds have stored food in a special type of nourishing tissue, endosperm. Endosperm remains persistent till maturity (germination) in these seeds. Examples - maize, wheat, and castor.
Non-albuminous seeds (also known as exalbuminous seeds) have stored food and cotyledons. In these seeds, the endosperm is completely used during the development of the embryo. Example - pea.