Petals of a flower are arranged in such a way that each overlaps a petal on one side and is overlapped by other petal on the other side. The eastivation is

Options

A. Valvate
B. Quincuncial
C. Imbricate
D. Twisted

Answer

To determine the type of aestivation in which the petals of a flower overlap such that each petal overlaps one on one side and is overlapped by another on the other side, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Aestivation**: Aestivation refers to the arrangement of petals and sepals in a flower bud before it opens. It describes how these parts are positioned relative to each other.

2. **Identifying the Overlapping Pattern**: According to the question, each petal overlaps another petal on one side and is overlapped by a different petal on the other side. This indicates a specific pattern of arrangement.

3. **Evaluating the Options**:
- **Option 1: Valvate**: In valvate aestivation, there is no overlapping of petals. This does not fit the description provided in the question.
- **Option 2: Quincuncial**: In quincuncial aestivation, there are two outer petals and two inner petals, with one petal twisted. This does not match the overlapping pattern described.
- **Option 3: Imbricate**: In imbricate aestivation, the petals overlap irregularly. This is also not consistent with the regular overlapping described in the question.
- **Option 4: Twisted**: In twisted aestivation, the petals overlap each other in a regular manner, which aligns with the description given in the question.

4. **Conclusion**: Based on the analysis of the options, the correct type of aestivation for the arrangement of petals described in the question is **twisted**.

### Final Answer:
The aestivation is **twisted**.