explain with suitable examples the diffrrent types of phyllotaxy. give significance of phyllotaxy.
The mode of arrangement of leaves on the tem and branches is called Phyllotaxy..
1) Alternate/spiral phyllotaxy : Only one leaf arises at each node. Leaves are arranged with definite gaps around the stem and found in definite vertical rows. Each row of leaves is called Orthostichy.
Eg : Hibiscus, Ficus.
2) Opposite Phyllotaxy :
Leaves are developed at each node lying oppostie to each other. It is of two types.
Opposite superposed : In this type the opposite leaves of all the nodes lie one above the other . Eg : Quisqualis
Opposite decussate : In this type, a pair of leaves at one node lie at right angle to the next pair of leaves at the next node . Eg : Calotropis.
3) Whorled or Circulatr Phyllotaxy : If more than two leaves arise at a node, it is called whorled phyllotaxy. Eg : Nerium..
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