100 



WEED FLORA OF IOWA 









■ a; 



\.^4- 



Fig. 56. Western Tumbleweed or Winged Pigweed (Cyololoma atripjici/olium) 



Sandy soil, Muscatine Island, etc. 



(Photographed by Colburn.) 



Fio. 56-A. Distribution of Winged Pigweed. 



