Question

The botanical term used for the androecium in a flower of China rose (Hibiscus rosa sinensis) is
A. Polyadelphous
B. Monadelphous
C. Diadelphous
D. Polyandrous

Answer 1

Hint: Androecium refers to the sum up of male reproductive organs of the plant. Androecium plays two important roles i.e. production and storage of pollen grains (minute body of different shape and structure which is formed in the male organ).

Complete answer:
A. Polyadelphous- Polyadelphous flowers are those flowers where stamens are united and they are fused or arranged in two or more groups or bundles. For example, citrus, castor, etc.
B. Monadelphous- Monadelphous flower having all the stamens united by their filaments within the flower to form a single group. For example, China rose, ladyfinger, etc.
C. Diadelphous- In Diadelphous flowers stamens have united by their filaments to form two groups or bundles. For example, pea, etc.
D. Polyandrous- In polyandrous conditions there are many stamens and filaments united in many bundles or groups with their anthers remaining free. For example, corchorus, etc.

Hence, the correct answer is option (B).

Note: China rose (Hibiscus rosa sinensis) also known as Chinese hibiscus, Hawaiian hibiscus belongs to the family of Malvaceae. Widely cultivated in the tropical and sub-tropical regions and grown as an ornamental plant. It is a bushy, evergreen shrub or small green tree. This plant is known for its genetic characteristics of polyploidy i.e. it is a condition when more than two sets of chromosomes are present.