EXERCISE 116 

 IDENTIFICATION OF COMMON WEEDS 



Materials. Common weeds collected from fields in the vicinity. 

 Keep a record of the kind of crop with which each weed was found 

 associated. Collect particularly weeds whose names are not known 

 to you. 



Directions for work. If the weeds are in flower, proceed to 

 identify them with the aid of Gray's " Manual " or such other 

 flora as may be applicable to your region. If not in flower, it 

 is possible to identify only by the aid of illustrated floras and 

 " weed books." (See list below.) 



Keep notes on each specimen studied. These notes should 

 show the name of the weed, the principal characteristics by 

 which it may be recognized, the crops which it commonly 

 infests, the character of the damage done, and the means of 

 combating. 



The value of the notes for future reference will be greatly 

 increased if a specimen of each kind of weed is pressed and 

 mounted on a herbarium sheet with name attached. 



Books for Identification 



CHESTNUT. "Thirty. Poisonous Plants," Farmers* Bulletin No. 86, 



U. S. Dept. Agr. 

 DEWEY. " Weeds ; and how to kill them," Farmers' Bulletin No. 28, 



U. S. Dept. Agr. 

 "Farm Weeds of Canada," Government Printing Bureau, Ottawa, 



Canada. 



GEORGIA. Manual of Weeds. The Macmillan Company. 

 MARSH. ** Larkspur, or * Poison Weed,' " Farmers' Bulletin No. 531, 



U. S. Dept. Agr. 

 MARSH. " Principal Poisonous Plants of the Western Stock Ranges," 



Bureau of Plant Industry, U. S. Dept. Agr. 

 NORTON. " Maryland Weeds," Bulletin No. 155, Md. Agr. Exp. Sta. 



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