Description of the Sozv Thistle. 125 



The perennial sow thistle makes its 

 appearance in May, and continues to grow 

 until the autumn. It blossoms in July, 

 and ripens its seeds in July and August. 

 It will grow in any kind of soil, but it is 



THE PERENNIAL SOW THISTLE 



most at home in rich moist loams, and 

 gives least trouble in stiff clays. 



The perennial sow thistle, Hke the Can- 

 ada thistle, infests all kinds of crops, and 

 it ripens its seeds somewhat earlier than, 

 or simultaneously with, tlie crops amid 

 which it grows ; the only crops of which 



