Question

Give one-word for the following:

The arrangements of leaf on the stem

Answer 1

Phyllotaxy:

1. The arrangement of leaves in the stem or its branches is called phyllotaxy.
2. The aim of phyllotaxy is to expose all leaves to maximum sunlight and air.
3. There are three types of phyllotaxy:
   • Alternate: A single leaf arises from a node. Eg. mango, sunflower.
   • Opposite: Two leaves arise from a node in the opposite direction. Eg. Calotropis, guava.
   • Whorled: If more than two leaves arise from a single node and are arranged in a whorl or circle it is called whorled phyllotaxy. Eg. Oleander, Asparagus.

Final answer: The arrangement of leaves on the stem is called phyllotaxy.