6
Question
Identify in order the plants showing alternate, opposite and whorled phyllotaxy.
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Solution
The correct option is B China rose, Calotropis and Nerium
Phyllotaxy means the arrangement of leaves on both stem and branches. Mainly the leaves are arranged in three ways :
Alternate - In this, each node gives rise to single leaf and these are arragned alternately given a spiral form (e.g., mango, china rose etc)
Opposite - In this, each node gives rise to two leaves arranged opposite to each other. It can be opposite superposed (e.g. Ixora) or opposite decussate (e.g., Ocimum, Calotropis prosera)
Whorled - In this, more than two leaves are formed from each node and are arranged in a whorl (e.g., Nerium, Alstonia etc)
Phyllotaxy means the arrangement of leaves on both stem and branches. Mainly the leaves are arranged in three ways :
Alternate - In this, each node gives rise to single leaf and these are arragned alternately given a spiral form (e.g., mango, china rose etc)
Opposite - In this, each node gives rise to two leaves arranged opposite to each other. It can be opposite superposed (e.g. Ixora) or opposite decussate (e.g., Ocimum, Calotropis prosera)
Whorled - In this, more than two leaves are formed from each node and are arranged in a whorl (e.g., Nerium, Alstonia etc)
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