4 BUDS AND STIPULES 



In the Begonias (fig. 2), for instance, as Mr. Potter 

 has pointed out (I), 1 the buds are shaded from the over- 

 powering heat of the sun by the older leaves. Plants 

 grown under artificial conditions do not show the avrange- 



FIG. 3. FIG. 4. 



YOUNG LEAVES OF HYPEBICUM CALYCINUM. Nat. size. 

 FIG. 3, seen from the side. FIG. 4, with one leaf turned back to show the younger, 

 enclosed pair (B). 



ment well, as the leaves are often drawn to one side or 

 the other by the light. But Mr. Potter, who has had the 

 opportunity of examining many species in a wild state, 

 found that they were always more or less arranged as 

 shown in fig. 2. 



1 The works referred to by these numbers (1, &c.) are given in the 

 Bibliography ' at the end of the book. 



