THE BEHAVIOUR OF FLOWERS 161 
THE SUNFLOWER 
The flower head. We have already seen how the 
sunflower plant behaves toward light. We are now 
interested in observing the behaviour of the flowers. 
— You should learn, first of all, that the large, showy blos- 

Fic. 198. Daisy with ray and disk florets (enlarged), and floret of dandelion. 
som is not a single flower. It is made up of a great 
many flowers. It is a “head” of flowers. ‘There are 
two kinds of flowers in a head. I am sure you can tell 
the two kinds apart. The most showy ones are on the 
edge or margin of the head. They stand out like 
rays of the sun; so we call them ray flowers. The 


