124 Weeds. 



ing cleanliness in this field, so long as it 

 remains a pasture, should not be more 

 than $2.50. 



(2) THE sow THISTLE. 



There are several varieties of the sow 

 thistle, but some of them do not give much 

 trouble to the cultivator of the soil, and 

 it will be sufficient for our purpose here to 

 speak only of the variety known as the 

 perennial or corn sow thistle {Sonchns 

 arvcnsisy, as it is the only form of this weed 

 which is very difficult to eradicate. The 

 corn sow thistle is a creeping perennial, 

 while nearly all the other varieties of the 

 sow thistle are annuals. The plant has an 

 upright habit of growth, and grows from 

 one to three feet high, but when the soil 

 is quite congenial it sometimes reaches a 

 greater height. Like the Canada thistle, 

 the perennial sow thistle is somewhat 

 branched towards the top. Its stems are 

 rather hairy or bristly, especially its flower 

 stems ; they are hollow, and when bruised 

 a milky fluid exudes from them. The 

 prickles upon its leaves are harmless. Its 

 blossoms are yellow, and the plants are 

 great producers of seed. 



