-Kumudinee, Subject Matter Expert at Edumarz.
Solution: Depending upon the position of the calyx, corolla, and androecium, the flowers are described as hypogynous, perigynous, and epigynous with respect to the ovary on the thalamus.
Hypogynous flowers: in this type of flower the ovary occupies the highest position on the thalamus while other floral parts are situated below it.
In the hypogynous flowers the ovary is superior e.g China rose, mustard etc.
Perigynous flowers:in this type of flower the ovary is situated at the centre and other floral parts are arranged on the rim of the thalamus.
In the perigynous flowers the ovary is said to be half inferior e.g., plum, rose, peach.
Epigynous flowers: in this type flower the thalamus grows around the ovary fusing with its wall.
The other floral parts are present above the ovary. Hence, the ovary is said to be inferior e.g., flowers of guava and cucumber.