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

The question asks about the type of stamens found in certain plants. It's important to understand what "diadelphous" stamens mean in botanical terms:

• Diadelphous: This term refers to a condition in flowering plants where the stamens (the male parts of the flower) are fused into two separate groups.

Now, let's analyze the options:

• China Rose (Hibiscus rosa-sinensis): This plant has stamens that are usually united into a single group, forming a column around the style (monadelphous).
• Citrus: Like the China Rose, Citrus plants tend to have multiple separate stamens or fused in a way that does not match the diadelphous arrangement.
• Pea (Pisum sativum): This plant typically has a diadelphous arrangement where nine stamens are fused into one group and one stands alone, forming two groups.
• China Rose and Citrus: As explained, neither of these is characterized by diadelphous stamens.

Given this analysis, the correct answer is:

• Pea: This plant exhibits the diadelphous condition by having its stamens arranged into two groups, nine fused together and one separate.

Hence, the correct answer is: Pea.