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- 
Fic, 246. — Sundew, showing the leaves which catch and digest insects. 
fied 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 
