Phyllotaxy is the study of the arrangement of leaves on the stem or a branch of a plant. It is of three types:
1. Alternate -In this type, a single leaf arises from the node of a branch. Example - Sunflower, Mustard.
2. Opposite - In this type, two leaves arise from the node in opposite directions. Example - Guava and Jamun plants.
3. Whorled - In this type, three or more leaves arise from the same node. Example - Astonia.