More than two bundles of united filaments define which condition?

• A. Epipetalous
• B. Synandrous
• C. Polyadelphous
• D. Adelphous

Answer: (C)

The concept here is how the staminal filaments are arranged in the androecium. Filaments can be free or they can be united into bundles. When there is just one bundle, that’s monadelphous; when there are two bundles, that’s diadelphous; when there are more than two bundles, that’s polyadelphous. The key idea is not the total number of filaments, but how many distinct bundles they form. If you have more than two bundles of united filaments, the correct term is polyadelphous. Synandrous means all filaments are fused into a single tube, and adelphous (adelphous) means the filaments are free and not united at all. So more than two bundles specifically points to polyadelphous.