If the gynoecium is present in the topmost position of the thalamus, then the flower is referred to as

Options

A. Inferior
B. Epigynous
C. Perigynous
D. Hypogynous

Answer

To solve the question regarding the position of the gynoecium in relation to the other floral parts, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Flower Structure**: In a flower, the gynoecium (the female reproductive part) can be positioned in various ways relative to the other floral parts (sepals, petals, and stamens).

2. **Identifying Terms**:
- **Hypogynous**: This term refers to a flower where the gynoecium is situated above the other floral parts. In this case, the ovary is at the top, and the other parts (sepals, petals, and stamens) are below it.
- **Perigynous**: Here, the gynoecium is surrounded by the other floral parts, which are at the same level as the ovary.
- **Epigynous**: This refers to a flower where the gynoecium is below the other floral parts, meaning the ovary is at the bottom.
- **Inferior**: This term is often used to describe flowers where the ovary is below the other parts, but it is not the correct term for the situation described in the question.

3. **Analyzing the Question**: The question states that the gynoecium is in the topmost position of the thalamus. This directly indicates that the other floral parts are positioned below the gynoecium.

4. **Conclusion**: Since the gynoecium is at the highest position, the correct term to describe this arrangement is "hypogynous." Therefore, the answer to the question is option D: Hypogynous.

### Final Answer:
The flower is referred to as **Hypogynous** (Option D).

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