272 LEAVES 



Leaves may sometimes develop into tendrils, either the entire 

 leaf or only a part of it becoming tendrils, as in the Sweet Pea. 

 (Fig. 243.} 



In the Barberry and some other shrubs, the leaves are so modi- 



FIG. 245. Pitcher Plant, showing pitcher-like leaves (Z). 



FIG. 246. Sundew, showing the leaves which catch and digest insects. 



fied as to form thorns. (Fig. 44-) Sometimes, as in the Com- 

 mon Locust, only a portion of the leaf is devoted to the formation 

 of thorns. 



The most interesting special forms of leaves are those adapted 



