Question

In Begonia and Gossypium, the cymose inflorescence is found which is
A. Polychasial
B. Monochasial
C. Dichasial
D. Thyrse

Answer 1

Hint: In a uniparous cyme, when the main axis terminates in the flower and a lateral branch is
produced from the base which also terminates in the flower. In this type of inflorescence, the main
the axis does not terminate in a flower. Then, the axis develops from the sides of the flower.

Complete answer:
An inflorescence is the cluster of flowers on the main branch of the stem or it is a complicated type of arrangement of flowers on the branches. The cymose inflorescence is known as a determinate simple inflorescence. Cyme is an important type of inflorescence and it is referred to as dichasial when there is only one secondary axis whereas when only one lateral axis is present it is known as monochasial. In the case of Begonia and Gossypium, only one lateral axis is present. Therefore, cymose inflorescence is monochasial. A monochasial cyme is also known as a uniparous cyme.

Hence, the correct option is Monochasial.

Note: In a monochasial cyme, each lateral and subsequent branch produces a lateral branch with a terminal flower. It is categorized into two different types- In the scorpioid type of inflorescence, the lateral branches develop alternatively on both sides of the axis. This type is commonly observed in
Gossypium. In the helicoid type of inflorescence, the lateral branches develop on the same side that forms a helix. This type is commonly observed in Begonia.