Define phyllotaxy. Explain with suitable examples the different types of phyllotaxy

morphology
cbse

#1

Phyllotaxy is the arrangement or distribution of leaves on the stem or its branches in such a way that they receive maximum sunlight to perform photosynthesis. Phyllotaxy is of three types :
1.Alternate or Spiral: In this type, a single leaf arise at each node in an alternate manner, e.g. Hibiscus rosa sinensis.
2.Opposite : Two leaves are borne from the node in opposite directions. It is of two types : (i) Opposite Superposed: e.g., Quisqualis. (ii) Opposite Decussate: e.g., Calotropis.
3.Whorled or Verticullate: More than two leaves are borne on a node, which form a whorl.