ON THE PROTECTION OF BUDS 



71 



heat. On examining the front view (fig. 105), we see that 

 the three leaves a, &, c, are so arranged that they com- 

 pletely cover over the growing-point and its younger 

 leaves, so that these latter are completely shielded ; 

 while the back view (fig. 106) shows how the younger 



FIG. 107. FIG. 108. 



SHOOT OF ST. JOHN'S WOKT (Hypericum), showing protection 



of the young pair of leaves (B). 

 FIG. 107. Side view. FIG. 108. Front view. 



internodes, with their smaller leaves, are hidden behind 

 the large leaves. The young leaves as they attain to 

 their mature size assume the same relative positions, 

 and so protect other young leaves, and so on.' I have 

 already referred (ante, pp. 4, 5) to the cases of Begonia 

 and Ehubarb. 



