,l"T"ir"r"i|""i"ii"T"ii 



llllllllllllllllllllllllllllll- 



Fig. 757: Ambrosia trifida: A, habit, upper portion, x V2; B, portion of flowering 

 raceme, x l^r, C, achene, x 2. (From Reed, Selected Weeds of the United States, Fig. 

 181). 



