The tree is shaped by it's environment. Example of broadleaved trees are oak, beech and maples. These trees lose their leaves every fall which makes them deciduous. This tree has broad leaves. Examples of a deciduous tree are ash, beech, birch, maple and oak.
Some scientists think that trees can save more water if they lose their leaves.
A process called transpiration passes the water through the leaves. The tree has narrow hard leaves. These narrow hard leaves are called needles or scales. Most conifers are evergreen and produce cones. The Palm is classified as a tropical tree.