Question

Biparous or Dichasial Cyme occurs in?
A. Begonia
B. Dianthus
C. Calotropis
D. Dorstenia

Answer 1

This is a type of inflorescence in which growth of the flower starts from the main axis and leads to flower development at its apex, and the lateral axis also develops into the terminal flower which also integrates with the flower.

Complete answer:
Inflorescence means what type of structure or pattern of flowers is present in a particular species of plant. Mainly it is classified into six classes that is, racemose inflorescence, cymose inflorescence, compound inflorescence, cyathium inflorescence, verticillaster inflorescence and hypanthodium inflorescence.
This type of inflorescence can also be divided into four categories that is,
- Uniparous or monochasial cyme
- Biparous or dichasial cyme
- Multiparous or polychasial cyme
- Cymose capitulum.
These can be explained as:
Uniparous or monochasial cyme: In this type the arrangement of flowers is such that its main axis ends in a flower and this produces only one branch at the time when the flower ends. And other branches also produce only one primary branch example, Solanum nigrum.
This type of inflorescence has flowers and peduncles have only one terminal flower which stops after that. This peduncle produces two lateral flowers or two lateral branches which terminate in this flower. Examples are jasmine, teak, saponaria, etc.

So, our answer will be option ‘B’ that is dianthus.

Note: Cymose inflorescence is the second class of the inflorescence classes, in which the growth of the main axis of the flower is ceased by the development of the flower apex, and lateral axis of flower also develops into the terminal flower which also reaches to the highest point of the growth in the flower which is also ceased. This type of flower can be stalked or without stalk.