198 VEGETABLE PHYSIOLOGY 
Drosera is a small plant which is found growing upon a 
substratum of bog-moss (Sphagnum). Its dimensions are 
small, the plant not being more than a few inches in height. 
It bears a rosette of leaves, from the middle of which rises a 
single scape of flowers. The leaves are covered with stalked 
Tra. 95.—Lntar or Drosera, SHOWING THE GLANDULAR TENTACLES. 
glands (fig. 95), which stand out from the surface. Each 
gland has a somewhat substantial stalk, containing a rudi- 
mentary vascular bundle. At the top of the stalk is a 
rounded head which is always covered by a viscid secretion 
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 
