Describe the arrangement of floral members in relation to their insertion on thalamus.

Dear Student

 on the positionof the calyx, corolla, and androecium (with respect to the ovary onthe thalamus), the flowers are described as hypognous, perigynous,and epigynous.

In hypogynous flowers,the ovary occupies the highest position on the thalamus while otherfloral parts are situated below it. In such flowers, the ovary issuperior e.g., China rose, mustard etc.

In perigynous flowers,the ovary is situated at the centre and other floral parts arearranged on the rim of the thalamus. The ovary here is said to behalf inferior e.g., plum, rose, peach

In epigynous flowers,the thalamus grows around the ovary fusing with its wall. The otherfloral parts are present above the ovary. Hence, the ovary is said tobe inferior e.g., flowers of guava and cucumber.
Regards