Question

The botanical term is 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: It is a condition in which all the filaments of stamens are fused into a single bundle while anther remains free.

Complete answer:
Monadelphous is a botanical term that is used for the androecium in a flower of china rose. It is a species of tropical hibiscus which is a flowering plant of the Malvaceae family. The male part of the flower involves stem-like filaments and each filament ends with the pollen-producing anther. In this flower, all filaments are fused into a staminal tube that surrounds the style. Hibiscus rosa-Sinensis is a bushy, evergreen shrub that contains glossy leaves and red flowers.

Structure of china rose flower: The flower has 5 carpels, 5 locules, 5 sepals with unfused petals means they are each separate from one another. It has both male and female reproductive organs on the same flower. The pistil is the female reproductive part that includes the ovary where seed develops, the stigma that catches the pollen, and style which is a tube from stigma to the ovary. The ovary lies at the bottom of the flower. Hibiscus has only one superior ovary. Stamens are the male reproductive part of the flower that includes filament and anther. On the top, five hairy red spots are the stigma that sticks up above the anther.

So, the correct answer is ‘Monadelphous’.

Note:
Hibiscus is a dicot, solitary (axillary), and complete flower. It has a superior ovary, regular symmetry, and axile placentation.
Polyadelphous is the condition when filaments are joined partially into three or more than three groups while anther remains free.