THE COMPOSITE. 



149 



prominent characters, they are often widely unlike, and 

 only experienced botanists can detect their affinities. 



It must not be supposed, however, that all plants 

 with flowers in a head belong to this family. The 

 case is not quite so simple. Plants are not to be 

 classified by a single character, you know. We must 

 not forget our principle that characters of cohesion 

 and adhesion in the flower are of the first importance 

 in determining affinities. 



Now, what are the characters of cohesion and ad- 

 hesion in which the florets of all the plants named in 

 Ex. XL VIII. agree? In the matter of cohesion, you 



FIG. 306. 



FIG. SOT. 



FIG. 808. 



always found the calyx gamosepalous, the corolla 

 gamopetalous, the stamens syngeneseous, and the 

 forked style, of which Fig. 306 is a magnified view, 

 seems to imply a syncarpous pistil, although the ovary 

 is one-celled and one-ovuled. 



