OTHER METHODS OF OBTAINING FOOD 193 
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, be- 
coming hopelessly captured. The stimulus of contact pro- 
vokes a movement of the stalked glands, all of which slowly 
bend over and bring their viscid heads to bear upon the 
struggling insect. The same disturbance causes an outflow 
Fie. 96.—Lzar_or Dionea muscipula, 
1, open; 2, closed; 8, one of the sensitive spines (x 50); 4, glands 
on the surface of the leaf (x 100). 
of acid enzyme-containing secretion, which surrounds the 
prey, and digestion and absorption follow as before. After 
atime the glands unfold again and resume their normal 
attitude, and the leaf is ready to receive another visitor. 
Dionza affords an instance in which the movement of 
capture is effected with greater rapidity. Like most of the 
insectivorous plants it possesses a rosette of leaves which 
rest upon the ground, and from the centre of the rosette 
it gives off a single inflorescence. The leaves are very 
13 
