It is the arrangement of leaves on stem or branch. The orientation and arrangement of leaves is such that they get appropriate amount of sunlight for photosynthesis.
It is of three types:
1. Alternate - A single leaf arising at each node. For example: china rose, mango
2. Opposite - Leaves occur in pairs at each node. This arrangement may be
3. Whorled - When there are more than two leaves at each node arranged in a circle or whorl. For example: Nerium