LEAF-FORMS AND FIGURES. 



19 



LESSON IV. 



FORMS AND FIGURES OF LEAVES. 



19. In many kinds of leaves we find the parts at the base 

 more or less enlarged backwards, as you see in this picture 



Fiff. 22. The Morning-glory. 



of the Morning-glory leaf (Fig. 22). This is the lieart- 

 shapedj or, more properly, the cordate leaf. It is truly an 



