<span>The arrangement of leaves on a stem shows the differences in trees , and this helps identify a tree during the growing season. The presence or absence of lobes on a leaf can also identify the species of a tree. The leaves also vary in shape, which indicates the position that it has on the tree. Also, some leaves are simple leaves, and others are compound leaves. Vein patterns and leaf edges can also indicate the type of tree that a leaf came from.</span>
