In calotropis , the leaves show (X ) phyllotaxy while the petals show (Y) aestivation.

Options

A. (X) : opposite and (Y) : valvate
B. (X) : alternate and (Y) : valvate
C. (X) : opposite and (Y) : twisted
D. (X) : alternate and (Y) : twisted

Answer

To solve the question regarding the phyllotaxy and aestivation in Calotropis, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Phyllotaxy**:
- Phyllotaxy refers to the arrangement of leaves on the stem or branch of a plant. It is important to identify the specific type of phyllotaxy exhibited by Calotropis.

2. **Identifying Phyllotaxy in Calotropis**:
- In Calotropis, the leaves are arranged in a specific pattern. Upon research, it is known that Calotropis exhibits **opposite phyllotaxy**. This means that at each node, there are two leaves that arise directly opposite each other.

3. **Understanding Aestivation**:
- Aestivation refers to the arrangement of sepals or petals in a flower with respect to one another. It describes how these floral parts are positioned before the flower opens.

4. **Identifying Aestivation in Calotropis**:
- In Calotropis, the petals exhibit a specific type of aestivation. The type of aestivation found in Calotropis is known as **valvate aestivation**. In this type, the petals or sepals touch each other at their edges without overlapping.

5. **Final Answer**:
- Therefore, the answer to the question is:
- (X) = Opposite phyllotaxy
- (Y) = Valvate aestivation

### Conclusion:
In Calotropis, the leaves show **opposite phyllotaxy** while the petals show **valvate aestivation**.

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