MORE ABOUT WEEDS 



145 



sembles the garden carrot so closely that it is easily 

 known. 



Figure 81 shows the wild carrot plant with the seed 

 magnified at c, and 

 natural size at d. 



Mowing the plants 

 as often as the flower- 

 stalks appear will de- 

 stroy them, and will 

 also prevent their seed- 

 ing. The first mow- 

 ing often seems to in- 

 crease the number of 

 plants, but, as the root 

 is biennial, it can not 

 live long. Pulling the 

 plants by hand, while 

 the ground is wet, is 

 one of the surest 

 methods of destruc- 

 tion. Sheep aid in 

 keeping them in sub- 

 jection. The plant 

 can not endure 

 thorough cultivation 

 and hence is rarely very troublesome in well tilled land. 



Bindweed (called also: Morning glory (incorrectly), 

 Field bindweed,) Convolvulus arvensis. This is a twin- 

 ing or creeping plant with a perennial root and an annual 

 stem. 



The white, or reddish-tinted funnel-shaped flowers 



G & M. Ag. 10. 



FIG. 8 1. Wild carrot; a, plant in bloom; 

 b, leaf; c, seed, magnified; d, seed nat- 

 ural size. 



