Phyllotaxy: It is defined as the arrangement of leaves or mature leaves on branches or the stem in a distinct pattern is known as phyllotaxy. It is of three types: alternate in which leaf arises in the alternate pattern at each node, for example, china rose, opposite type in which a pair leaves arise in the opposite direction at each node, for example, guava plants and calotropis and last one is whorled in which leaf form a whorl pattern at the node for example in Alstonia.