In which family pentamerous flowers having monoadelphous stamens and dry dehiscent fruit are present :-

Options

A. Leguminosae
B. Malvaceae
C. Cruciferae
D. Solanaceae

Answer

To solve the question regarding the family that has pentamerous flowers with monoadelphous stamens and dry dehiscent fruits, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Pentamerous Flowers**: These are flowers that have parts in multiples of five, meaning they typically have five petals and five sepals.
- **Monoadelphous Stamens**: This term refers to stamens where all the filaments are fused together to form a single structure, rather than being separate.
- **Dry Dehiscent Fruits**: These fruits open up upon maturity to release their seeds.

2. **Identify the Families**:
- The question provides four families to consider: **Euminaceae, Malvaceae, Cruciferae, and Solanaceae**.
- We need to determine which of these families exhibits the characteristics described.

3. **Analyze Each Family**:
- **Euminaceae**: This family does not typically have the characteristics of pentamerous flowers or monoadelphous stamens.
- **Malvaceae**: This family is known for having pentamerous flowers with monoadelphous stamens and dry dehiscent fruits. Examples include hibiscus and okra.
- **Cruciferae (Brassicaceae)**: While this family has some dehiscent fruits, it does not typically have monoadelphous stamens.
- **Solanaceae**: This family does not fit the criteria either, as it usually has a different floral structure.

4. **Conclusion**:
- Based on the analysis, the family that fits all the criteria of having pentamerous flowers, monoadelphous stamens, and dry dehiscent fruits is **Malvaceae**.

### Final Answer:
**Malvaceae**