Question

The technical term used for the androecium in a flower of China Rose (Hibiscus rosa-sinensis) is

• A. Diadelphous
• B. Monadelphous
• C. Polyandrous
• D. Polyadelphous

Answer 1

The correct option is B

Monadelphous

The correct option is B.

Explanation of correct option:

1. Androecium refers to the stamens in the flower which forms a whorl surrounding the gynoecium and is inside the perianth.
2. Stamens can be present as free or fused.
3. When filaments of all the stamens are united forming a single bundle with free anthers, it is called monadelphous stamens.
4. In China rose there is cohesion of stamens by the fusion of filaments into a single bundle.
5. So, China rose is an example of monadelphous androecium.

Explanation of incorrect options:

Option A:

1. When filaments of all stamens are united forming two bundles with free anthers, it is referred to as diadelphous.
2. Example - pea.

Option C:

1. When the stamens of a flower are free, the condition is referred as polyandrous.
2. Example - Petunia.

Option D:

1. When filaments of all stamens are united forming more than two bundles with free anthers, it is referred to as Polyadelphous.
2. Example - Lemon.

Final answer: The technical term used for the androecium in a flower of China Rose (Hibiscus rosa-sinensis) is monadelphous.