Compound leaves are formed by the fusion of several leaflets that are attached to a common petiole. They are found in many plants and can be classified into five different types: palmate, pinnate, bipinnate, trifoliate, and palmately compound. Compound leaves are often more complex in shape and structure than simple leaves, and they provide protection and support to the plant. In Egypt, they can be seen in many types of plants, including palm trees, papyrus, and corn. Compound leaves also provide food for some animals, such as caterpillars, which feed on the leaves. Additionally, they are known to provide a number of benefits to the environment, such as reducing air pollution and providing shelter for animals.