Explain with suitable examples the different types of phyllotaxy.

Phyllotaxy refers to the pattern or arrangement of leaves on the stem or branch of a plant. It is usually of three types:
(i) Alternate: In alternate phyllotaxy, a single leaf arises from the node of a branch. This type of phyllotaxy is observed in the sunflower, mustard, and peepal.
(ii) Opposite: In this type the plants has two leaves arising from the node in opposite directions. It is found in guava.
(iii) Whorled: Plants with whorled phyllotaxy have three or more leaves arising from the node. It is found in Alstonia.