726 



WEED FLORA OF IOWA 



.♦- HO* 



mg. 549A 1 



Fig. M9A 11 



Fig. 549A III 



Fig. B49-A. Seeds of weeds scattered with agricultural seeds. I. Dodder In 

 clover and alfalfa seed. II. Wliite Sweet Clover In alfalfa seed. Ill- 

 Bitter Dock (.Rumex obtusifoUtis) in red clover seed. 



Many of these weeds have made their way into California by 

 way of South America. Others are indigenous and widely scat- 

 tered on the Paefiic coast. The Pacific northwest has in common 

 with the rest of the Pacific coast many European weeds, but also 

 many that are indigenous to the country. Many years ago Cusick 

 called attention to the predominance of the Northern fireweed 

 {Epiloivwm angustifolium) , which, after the removal of the forest 

 and the burning of the slashings, comes Up in great abundance. 

 The writer in another connection* discussed the weeds commonly 



•The Problem of Weeds in the West ; Proc. la. Acad. So. 15 : 34. 



