Photo; J. J, Ward. 



THE THORNS OF THE ROSE AND OF THE BRAMBLE 

 (RIGHT) SERVE A DOUBLE PURPOSE 



They are sufficiently barbarous to protect the plants from 

 browsing animals. Especially in the bramble, they also help 

 to secure the trailing stems, preventing them slipping from 

 the supports over which they ramble. 



Photo: J. J. Ward. 



FLOWERS OF BARBERRY 



The stamens of a number of flowers move in response to 

 the touch of a visiting insect. In the barberry the sta- 

 mens lie back in the boat-shaped petals. A touch on the 

 filament or stalk causes the stamen to move inwards 

 sharply towards the ovary. Here they are holding a 

 large pin with which they were touched. An insect doing 

 this is dusted with pollen. 



