Trees are big and tall plants. They have very thick, woody and hard stems called the trunk. This single main stem or the trunk gives rise to many branches that bear leaves, flowers and fruits. Some trees are branchless like coconut tree; i.e., they have only one main stem which bears leaves, flowers, and fruits all by itself. The life-span of the trees are very large. i.e., for several years. Banyan, mango, neem, cashew, teak, oak are some examples of trees.