126 Weeds. 



this statement is not true being, probably, 

 red clover and alfalfa. 



It is propagated by means of its seeds, 

 which are able to float about in the air by 

 reason of the downy attachment which 

 they possess. As its seeds are very numer- 

 ous, its numbers increase very rapidly in 

 the neighborhood of any place where once 

 they are allowed to ripen. It is an open 

 question if they have the power of sus- 

 taining a long flight, like the seeds of the 

 Canada thistle. The perennial sow thistle 

 is also propagated with much rapidity by 

 means of its root-stocks, which are numer- 

 ous and which, like those of the Canada 

 thistle, are "creepers" bearing a very large 

 number of latent buds, as is shown in the 

 sketch. Its seeds, like those of the Can- 

 ada thistle, are constantly being widely 

 distributed by being carried about with the 

 seeds of cereals, clovers, and grasses. 



Modes of Eradieation. 



The means to be taken for destroying 

 this intruder are essentially the same as 

 those 'described for the eradication of the 

 Canada thistle, and therefore need not be 

 repeated here. 



