
CHAPTER XXI 
BEHAVIOUR OF CLIMBING PLANTS 
Different ways of getting up to the light. Plants 
have different ways of getting into a position where 

FIG. 185. Coiling stem of conyolvulus. 
there is light. Trees build. tall, stout trunks, which 
hold their branches and leaves far above other plants. 
Shrubs and_ tal] herbs build slender trunks to get 
150 
