THTl PABTS OF LEAVES 



81 



For example, we have seen that the bud-scales of 

 the black currant (Fig. 51) gradually pass into 

 leaves : but the leaves are borne on the ends of 



Fig. 75. 

 Honeysuckle. 



Fig. 7C. 

 Black walnut. 



scales ; therefore, the scales must represent trans- 

 formed petioles, not transformed blades. If the 

 enlarged and green bud-scales of the Norway maple 



G 



