Explain the terms Monadelphous, Diadelphous and Polyadelphous using suitable diagrams. In each case name a flower possessing such an androecium.

1. Monadelphous — Stamens are united in one group by their filaments. Only anthers are free. E.g. China Rose.

2. Diadelphous — The filaments are united in two bundles. E.g. Pea.

3. Polyadelphous — The filaments are united in several groups. E.g. Bombax.