Question

Diadelphous stamens are found in:

• A. China rose
• B. Citrus
• C. Pea
• D. China rose and citrus

Hint:

Diadelphous is a condition in which stamen are united by their filaments so as to form two groups. Stamens are said to be diadelphous when these are united in two bundles like in Pea. 

Answer 1

The Correct Option is C

To determine the correct answer for this question, we need to understand the concept of diadelphous stamens and their occurrence in certain plant species.

Diadelphous Stamens:

Diadelphous stamens refer to a specific arrangement of stamens in which the filaments are fused into two separate groups. This characteristic is commonly observed in certain plant families.

Explanation:

1. China rose (Hibiscus rosa-sinensis): The stamens of China rose are monadelphous, meaning all stamens are united by their filaments into a single group.
2. Citrus: Citrus plants generally have monadelphous or polyadelphous stamens, not diadelphous.
3. Pea (Pisum sativum): In pea plants, the stamens are typically diadelphous. In this arrangement, the stamens are grouped into two clusters - one cluster with nine stamens and the other with one solitary stamen.
4. China rose and citrus: As discussed, both China rose and citrus do not exhibit diadelphous stamens.

From the above explanations, it is clear that Pea (Pisum sativum) is the plant species that exhibits diadelphous stamens.

Conclusion: Therefore, the correct answer is Pea.