1.

 Explain with suitable examples the different types of phyllotaxy.

Answer»

Phyllotaxy: The arrangement of leaves on the stem or branch is called phyllotaxy. There are three types of phyllotaxy, which are as follows: 

a. Alternate: In this type of leaf arrangement, a single leaf arises at each node in alternate manner, e.g. China rose, mustard, sunflower, etc. 

b. Opposite: In this type of leaf arrangement, a pair of leaves arise at each node. The leaves lie opposite to each other in this case, e.g. Calotropis, guava, etc. 

c. Whorled: In this type of leaf arrangement, more than two leaves arise at a node, e.g. Alstonia.



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