SCATTERING OF WEEDS 



635 



Kg. 498A ■ Pig. 498B Kg. 4980 



Fig. 498., Weeds scattered by animals. A. Buffalo Bur (Solatium rostratum,). 

 B. Pitchforks (.Bidens frondosa), the downwardly barbed points admirably 

 suited for animal dissemination. C. Carrot (Daucus carota). 

 (Drawings by Ada Hayden.) 



■''Uiiiui, 



FIO. 499. A. 



Fig. 499A Pig. 499B Pig. 4990 



Cow With attached Burdock. B. Burdock enlarged. C. 

 frey iOynoglossum) enlarged. 



Com- 



(A, after Bailey, MacmlUan & Co. ; B, after Dewey, U. S. Dept. Agr.) 



