OTHEB METHODS OF OBTAINING FOOD 207 



that it pours out. From the shining appearance of the 

 glands with their drops of mucilage, the name of the plant, 

 sundew, is derived. When an insect alights upon the leaf 

 it is entangled in the secretion, and, struggling to be free, is 

 brought into contact with more and more of the drops, becom- 

 ing hopelessly captured. The stimulus of contact provokes a 



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FIG. 99. LEAF OF Drosera, SHOWING THE GLANDULAB TENTACLES. 



movement of the stalked glands, all of which slowly bend 

 over and bring their viscid heads to bear upon the strug- 

 gling insect. The same disturbance causes an outflow of 

 acid enzyme-containing secretion, which surrounds the 

 prey, and digestion and absorption follow as before. After 

 a time the glands unfold again and resume their normal 

 attitude, and the leaf is ready to receive another visitor. 



