Question

Phyllotaxy is decussate in

• A. Hibiscus Rosa-sinensis
• B. Catharanthus roseus
• C. Pisum sativum
• D. Nerium indicum

Answer 1

The correct option is B

Catharanthus roseus

The correct option is B.

Explanation for the correct option :

1. Decussate phyllotaxy is observed in Catharanthus roseus.
2. In this, the leaves are arranged in opposite pairs.
3. In Catharanthus roseus or periwinkle two leaves arise from the same point.

Explanation for incorrect options:

Option A:

1. In Hibiscus Rosa sinesis, leaves are simple.
2. They are arranged in alternative phyllotaxy.

Option C :

1. Pisum sativum is commonly known as the pea plant.
2. It shows alternate phyllotaxy.

Option D:

1. Nerium indicum is a flowering shrub.
2. It has a whorled phyllotaxy in which leaves arise from a single node and forms a structure.

Final answer: Phyllotaxy is decussate in Catharanthus roseus.