Characteristic feature of Malvaceae family is :-

Options

A. Monothecous anthers
B. Didynamous stamens
C. Presence of staminodes
D. Basal placentation

Answer

### Step-by-Step Solution:

1. **Understanding the Malvaceae Family**: The Malvaceae family, commonly known as the mallow family, includes various plants such as cotton, hibiscus, and okra.

2. **Identifying Characteristic Features**: The question asks for the characteristic feature of the Malvaceae family. We need to analyze the options provided.

3. **Analyzing the Options**:
- **Monothecus Anthers**: This feature indicates that the anthers are single-lobed. In Malvaceae, the anthers are monothecus, meaning they have only one lobe and are bisporangiate (producing two microsporangia).
- **Didynamous Stamens**: This refers to a condition where there are two different lengths of stamens. This is characteristic of the family Lamiaceae, not Malvaceae.
- **Presence of Staminodes**: Staminodes are sterile stamens. This feature is characteristic of the family Begoniaceae, not Malvaceae.
- **Basal Placentation**: This type of placentation involves having a single ovule at the base of the ovary. This is a characteristic of the Asteraceae family.

4. **Conclusion**: After analyzing all the options, the only characteristic feature that correctly identifies the Malvaceae family is **monothecus anthers**.

5. **Final Answer**: The characteristic feature of the Malvaceae family is **monothecus anthers**.