In autumn season most of the plants and trees shed their leaves whereas in spring season the new leaves grow on them. The trees look barren after the falling of leaves in autumn. These types of trees which shed their leaves every year are known as ‘deciduous trees’. On the other hand there are some trees which do not shed their all leaves at a time and they remain green. Such types of trees are known as ‘evergreen trees’. Let us study why some trees always remain green. Actually, all the trees shed their leaves. But the leaves of deciduous trees live only for one year. However, the leaves of evergreen trees remain for two to three years. In evergreen trees as the leaf dries up it falls down and a new leaf grows in its place with in few days. As a result all the leaves are not shed at a time. Therefore the cycle of falling and growing of leaves continues and the trees always retain large number of leaves. Firs and pines are well known evergreen trees. In addition to these there are several other trees that remain green like The Italian cypress that is found in Europe. The white flowers of magnolia plants look very beautiful. These plants do not have defoliation and are used for decoration. The Olive plant is also a evergreen plant. The juniper plants which are found in North Britain, the leaves of these plants are short and bitter and they are famous for their greenness. Besides these myrtles of Britain, oak tree, palm tree, orange tree, ivy creeper, oleander of North Africa, tea plants all are evergreen plants and trees.