Identify flower which is not epigynous.

Options

A. Ray floret of sunflower
B. Plum
C. Guava
D. Cucumber

Answer

To solve the question of identifying which flower is not epigynous among the given options (ray florets of sunflower, plum, guava, cucumber), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terminology**:
- **Epigynous Flowers**: These are flowers where the ovary is situated below the other floral parts (like petals and sepals). In epigynous flowers, the thalamus is often flattened, and the ovary is considered inferior.
- **Perigynous Flowers**: These flowers have a half-inferior ovary, meaning the ovary is positioned in such a way that it is partially surrounded by the other floral parts.

2. **Analyze the Options**:
- **Ray florets of Sunflower**: These are epigynous flowers as the ovary is inferior.
- **Plum**: Plum flowers are known to be perigynous, meaning they have a half-inferior ovary.
- **Guava**: Guava flowers are also epigynous, with an inferior ovary.
- **Cucumber**: Cucumber flowers are epigynous as well, with an inferior ovary.

3. **Identify the Correct Flower**:
- From the analysis, we see that the **plum** flower is the only one that is not epigynous; it is classified as perigynous.

4. **Conclusion**:
- Therefore, the flower that is not epigynous among the options provided is **plum**.

### Final Answer:
The flower which is not epigynous is **plum**.