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

  • (a) Decussate - When the successive pairs of leaves at upper and lower nodes are at right angles. For example: Tulsi, Calotropis
  • (b) Superposed - when the successive leaf pairs at upper and lower nodes are exactly in the same plane. For example: guava

3. Whorled - When there are more than two leaves at each node arranged in a circle or whorl. For example: Nerium