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 Barberrv and some othei- shrubs, the leaves are so modi- 



FiG. 245. — Pitcher Plant, showing pitcher-Uke leaves (I). 



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



tied as to form thorns. {Fig. 244-) 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 



