768 



WEED FLORA OF IOWA 



Fig. 568. Carrot (.Daucua carota). Common in the east. Probably first spread 

 from the cultivated carrot. 



county, 1906 (W. R. Moninger) ; "Whiting, 1907 (W. S. Whiting) 

 Allerton, 1907 (J. H. Duncan) ; Lamoni, 1907 (T. L. Naftsger) 

 Blaekhawk county, 1907 (Pammel) ; Ames, 1909 (J. R. Campbell) 

 Polk county, 1910 (Pammel) ; Rippey, 1910 (Osborn) ; Dumont, 

 1910 (Titus) ; Libertyville, 1911 (Armstrong) ; Bedford, 1911 

 (Spacht); Glidden, 1912 (Walters); Kelley and Ledges, 1912 

 (Pammel). 



Poison Hemlock (Conium maculatum) . 



This weed was reported by Dr. John Torrey in 1826 as occurring 

 on roadsides. It is mentioned by Dr. Gray in 1848 as occurring in 

 waste places. Britton in 1901 records it from Quebec to Michigan 

 and Indiana, California, and Mexico. Robinson and Fernald in 

 the 7th edition of Gray's Manual indicate "to Pennsylvania," the 

 same distribution that Britton gives. It is not, however, common 



