Description of the Canada Thistle. 117 



the least favorable conditions. Its seeds 

 are not only carried incredible distances by 

 the wind, but they are also distributed 

 everywhere by means of the seeds of all 

 kinds of cereal grains and of several of the 



THE CANADA THISTLE. 



clovers and grasses, among which they 

 ripen. They are also distributed by means 

 of manure. 



