MORE ABOUT WEEDS 



133 



eggs, Ramsted), Linaria mdgaris.Tbe snap dragon or 

 toadflax was brought to this country as a garden flower, 

 but it is becoming quite dangerous. It is perennial, and 

 is spread both by its seeds and its creeping rootstocks. 

 It tends to form a large patch, and, so far as it extends, 

 forces out all other plants. 



A plant with its head of flowers is shown in Figure 70. 

 I shows a single flow- 

 er; 2 shows an enlarged 

 vertical section of the 

 same; and 3, a ma- 

 tured seed pod. 



For small areas, it is 

 possible to destroy the 

 snap dragon by grub- 

 bing out the roots, but, 

 where the patches are 

 numerous and large, 

 the summer fallow is 

 the only treatment that 

 is likely to be success- 

 ful. Young plants may 

 be rooted out by hand 

 at a time when the 

 ground is very wet. 



Cocklebur or Clotbur, Xanthium strumarium. The 

 cocklebur is a rapidly growing, coarse weed, with an ir- 

 regularly branching stem, that grows to the height of from 

 one to two feet. There are two kinds of flowers grown 

 in separate heads or clusters on the same plant. The 

 staminate flowers are produced in roundish heads at the 



FIG. 70. Snap dragon. 



