198 



Weeds. 



near maturity they become so rigid that the 

 legs of horses require protection when they 

 have to travel among the mature weeds. 

 When near maturity the plant appears to 

 be almost leafless. Specimens of the plant 

 have been found with a diameter not less 

 than five feet. 



'^^i 



THE RUSSIAN THISTLE 



The Russian thistle does not begin to 

 grow very early in the season, hence if 

 grain crops are given an early start in the 

 spring the thistle which infests them will 



