Overian parts are fused, styles and stigmas free but overy part is uniloculor with free central placentation. The plant is

Options

A. Michelia
B. Nymphaea
C. Abutilon
D. Dianthus

Answer

To solve the question regarding the plant with specific floral characteristics, we can break down the information provided step by step:

### Step-by-Step Solution:

1. **Understanding the Characteristics**: The question states that the ovarian parts are fused, the styles and stigmas are free, and the ovary is unilocular with free central placentation.

2. **Identifying Key Terms**:
- **Ovarian Parts Fused**: This indicates that the carpels of the flower are joined together.
- **Styles and Stigmas Free**: This means that while the carpels are fused, the styles (the stalks of the stigma) and stigmas (the receptive part of the pistil) are separate.
- **Unilocular Ovary**: This means that the ovary has only one chamber.
- **Free Central Placentation**: This refers to the arrangement where the ovules are attached to a central column in the ovary rather than to the walls.

3. **Analyzing the Options**:
- **Michelia**: Typically has multiple carpels and does not fit the description.
- **Nymphaea**: Generally has a different structure and is not characterized by free central placentation.
- **Abutilon**: Usually has a different arrangement and does not match the description provided.
- **Dianthus**: Known for having two fused carpels, free styles, and free central placentation.

4. **Conclusion**: Based on the characteristics provided, the plant that fits the description is **Dianthus**.

5. **Additional Information**: Dianthus is a perennial herbaceous plant that is often used ornamentally and has medicinal properties.

### Final Answer:
The plant is **Dianthus**.

---