164 



DOG-DATSY. 



[CH. XII 



which the tube of the corolla is open down one side so 

 that it ends in a flat expansion, from which it takes the 

 name of a ligulate or strap-like floret. The white florets 

 of the Chrysanthemum, which are known as ray-florets, 

 are of the type shown in fig. 74, (7, but the ligulate part is 

 proportionately much longer than in Senecio. Not only 

 do the disc and ray florets of the dog- daisy differ from 



A. 

 B. 

 C. 



B 



FIG. 74. 



TUBULAR FLORET or A SENECIO. 

 THE SAME DIVIDED LONGITUDINALLY. 

 LIGULATE FLOBET OF THE SAME. 

 From Le Maout and Decaisne. 



each other in form and in colour, but in their reproduc- 

 tive organs. The ray-florets have an ovary, a style and 

 a stigma, but no anthers, while the disc-florets possess both 

 andrcecium and gyncecium. In some allied plants the 



