Question

Given below are the diagrammatic representation of position of floral parts on thalamus, condition of ovary. Find the correctly matched combination?

• A. Position of floral parts on thalamus - ; Condition of ovary - $\overline{G}$
• B. Position of floral parts on thalamus - ; Condition of ovary - $\overline{G}$
• C. Position of floral parts on thalamus - ; Condition of ovary - $\underset{-}{G}$
• D. Position of floral parts on thalamus - ; Condition of ovary - G–

Answer 1

The correct option is A Position of floral parts on thalamus - ; Condition of ovary - $\overline{G}$


Based on the position of calyx, corolla and androecium in respect to the ovary on thalamus, the flowers are described as hypogynous, perigynous and epigynous.

• Epigynous flower $\overline{G}$ - In epigynous flowers, the margin of thalamus grows upward enclosing the ovary completely and getting fused with it, the other parts of flower arise above the ovary. Hence, the ovary is said to be inferior as in flowers of guava and cucumber, and the ray florets of sunflower.
• Perigynous flower G– - If gynoecium is situated in the center and other parts of the flower are located on the rim of the thalamus almost at the same level, it is called perigynous. The ovary here is said to be half inferior, e.g., Plum, Rose, Peach.
• Hypogynous flower $\underset{-}{G}$ - In the hypogynous flower the gynoecium occupies the highest position while the other parts are situated below it. The ovary in such flowers is said to be superior, e.g., Mustard, China rose and Brinjal.