Evolution means descent with modification, or change in the form, physiology, and behavior of organisms over many generations of time. 

TLS Online TPP Program

#Id: 10745

#XL - R Botany

I- Homogamous head

This type of inflorescence exhibits single kind of florets. 

disc florets alone or ray florets alone

II- Heterogamous head; 

The inflorescence possesses both types of florets.

Example;   Helianthus

TLS Online TPP Program

#Id: 10746

#XL - R Botany

Cymose Inflorescence

It is a definite or determinate inflorescence

The stalked flowers are either basipetal or centrifugal

TLS Online TPP Program

#Id: 10747

#XL - R Botany

Simple cyme (solitary)

Determinate inflorescence consist of a single flower, it may be terminal or axillary

Example: Hibiscus rosa-sinensis

TLS Online TPP Program

#Id: 10748

#XL - R Botany

Monochasial cyme (uniparous)

A.helicoid (bostryx)

Ex: Hamelia, Drosera, Myosotis

Monochasial cyme (uniparous)

B. Scorpioid (cincinnus)

Ex: Heliotropium (cherry pie)

TLS Online TPP Program

#Id: 10749

#XL - R Botany

Simple dichasium (biparous)

A central axis ends in a terminal flower, further growth is produced by two lateral buds. 

Ex: Bougainvillaea, Jasmine, Teak, Mirabilis.

TLS Online TPP Program

#Id: 10750

#XL - R Botany

Compound dichasium

A terminal old flower develops lateral simple dichasial cymes on both sides.

Simple dichasium is called cymule

Ex: catchfly, or campion, Silene; 

Caryophyllaceae