842 WEED FLORA OP IOWA 



Hays, W. M. The Russian thistle or Russian tumble weed. Bull. 



Minn. Agr. Exp. Sta. 33:15. 



Weeds in our fields. Bull. 46 :373-382. 

 Henderson, L. T. Twelve of Idaho's worst weeds. Bull. Idaho 



Agr. Exp. Sta. 14:91-136. 

 Hill, E. J. Notes on Migratory weeds. Bull. Torrey Bot. Club. 



29 :564. 

 Hillman, F. H. Nevada weeds. Bull. Nev. Agr. Exp. Sta. 21 :15 ; 



22:11. 



Nevada weeds ; Nevada and other weed seeds. Bull. 38 :131. 

 Hitchcock, A. S., & Clothier, G. L. Reports on Kansas weeds. 



Bull. Kan. Agr. Exp. Sta. 50:19-54; 52:87-101; 57:64; 



66:19-54; 76:23; 80:113-164. 

 Horton, H. E. Weeds and farming in the Northwest. Farm Weeds. 



1909 (Apr.) 6-10. 

 Howitt, J. E. The perennial sow thistle and other weed pests of 



1908. Bull. Ont. Dept. Agr. 168:24. 

 Weeds of Ontario, Bull. 188 :144. 106f. 1911. 

 Hundeshagen, J. G. Lehrbuch der Forst u. landwirthschaftlichen 



Naturkunde. 372. Tubingen, 1829. 

 Jenkins, E. H. Weeds, feeds and seeds. Bull. Conn. Agr. Exp. 



Sta. 161 -.6. 

 Jones, It. R., and Morse, W. J. The shrubby cinquefoil as a weed. 



Rept. Vt. Agr. Exp. Sta. 1903 : 173-190. 

 Jones, L. R., & Orton, W. A. Notes on certain threatening weeds. 



Bull. Vt. Agr. Exp. Sta. 16 :169-173. 



Notes on Vermont weeds. Bull. 11 :219-228. 



Orange Hawkweed, or "Paint-brush." Bull. Vt. Agr. Exp. 



Sta. 56:15. 

 Kabsch, W. Das Pflanzenleben der Erde. 642. Hannover, 1870. 

 Kalter, Grace M. The weeds of the Miami Valley. Cont. Bot. Lab. 



Miami Univ. 4:72. 

 Knowlton, C. H. Two introduced plants [Brassica hirsuta and 



Bromus inermis in southern Massachusetts]. Rhodora 11 : 



120-121. 

 Krafft, Guido. Pflanzenbaulehre. 

 Lamson-Schribner, F., & Newman, C. L. Weeds on the farm. 



Bull. Tenn. Agr. Exp. Sta. (v. I) 3 :29-52. 

 Langethal, C. E. Lehrbuch der landwirthschaftlichen Pflanzen- 



kunde fur practische Landwirthe und Fremde des Pflanzen- 



reiches. 3 Parts. 533. Jena, 1841-1845. 



