INTRODUCTION 27 



florets, are crowded together upon a single head. 

 In the Thistle and in the flowers in the central 

 part of the White Daisy we have illustrations of 

 these florets in which the petals are united into a 

 tubular corolla, as is shown in the right-hand 



FLORETS OF COMPOSITE FLOWERS 



drawing of the figure above. In the case of the 

 Dandelion the petals are united into a corolla 

 which is tongue-like or strap-like and which is said 

 to be ligulate. This is shown in the left-hand 

 drawing of the figure above. If you will look 

 through a simple lens at some of these florets from 



