82 



LUSSOIfS WITS PLANTS 



(Fig. 50) are petioles, we have an example of 

 leaf -stalks which perform functions of leaf -blades. 



Fio. 77. 

 Various leaves of live oalc. 



Fio. 78. 

 Leaf of a. willow. 



88. The leaf of a willow is shown in Fig. 78 

 The stipules are so leaf-like as to indicate that they 



