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

Options

A. hypogynous
B. perigynous
C. epigynous
D. none of these

Explanation

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

### Step-by-Step Solution:

1. **Understanding Gynoecium**: The gynoecium is the female reproductive part of a flower, which includes the ovary, style, and stigma. It is crucial to know its position in relation to other floral organs.

2. **Identifying Floral Organs**: The main floral organs to consider are:
- Calyx (sepals)
- Corolla (petals)
- Androecium (stamens)
- Gynoecium (ovary)

3. **Positioning of Gynoecium**: The classification of flowers is based on the position of the gynoecium relative to the other floral organs. There are three main classifications:
- **Hypogynous**: The gynoecium is at the topmost position, above the other floral parts.
- **Perigynous**: The floral organs are at the same level as the gynoecium.
- **Epigynous**: The gynoecium is below the other floral organs, which are positioned above it.

4. **Conclusion**: Since the question specifies that the gynoecium is in the topmost position, the correct term to describe this flower is **hypogynous**.

5. **Example**: A common example of a hypogynous flower is the China rose (Hibiscus rosa-sinensis).

### Final Answer:
If the gynoecium is present in the topmost position of the thalamus, then the flower is referred to as **hypogynous**.

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