Diadelphous stamens are found in :

The correct answer is Pea.

To understand why diadelphous stamens are found in pea plants, let us break down the terminology and structure of stamens in flowers:

1. What is a Stamen?
A stamen is the male reproductive organ of a flower, typically consisting of a pollen-containing anther and a supporting filament.

2. Understanding Cohesion of Stamens:
In many flowers, stamens may fuse either by their filaments, their anthers, or both. Based on the fusion of filaments into groups (bundles), stamens are classified as:

• Monadelphous: Filaments are fused to form a single bundle or tube surrounding the pistil (e.g., China rose).
• Diadelphous: Filaments are fused to form two distinct bundles.
• Polyadelphous: Filaments are fused into more than two bundles (e.g., Citrus).

3. Diadelphous Stamens in Pea (Fabaceae family):
In pea flowers (belonging to the family Fabaceae), there are 10 stamens in total. Their filaments are arranged in a 9 + 1 pattern: nine of the filaments are fused together to form a sheath-like bundle around the ovary, while the tenth stamen remains completely free. This arrangement forms exactly two bundles, which is the defining characteristic of diadelphous stamens.