846 WEED FLORA OF IOWA 



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 Thellung, A. Zwei kleine Beitrage zur Adventivnora Deutsch- 



land. Allg. bot. Ztsche. 15:89-90. 

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Exp. Sta. 44:141-146. 

 Thornton, R. W. The Khaki hush (Aplopappus sp.) another noxious 



weed. Agric. Jour. Cape of Good Hope. 30:76-78. 

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for Tidskr. 17 :428-440. Abs. in Exp. Sta. Rec. 16 :61. 

 Tourlet, E. H. Catalogue des plantes vasculaires du departement 



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 Waddell, C. H. On some Irish hawkweeds. Irish Nat. 18 :149-150. 

 Waldron, C. B. The mustard family. Bull. N. D. Agr. Exp. Sta. 



16:19. 



Troublesome weeds of the mustard family. Bull. 6 :19. 

 White, P. J. Orange Hawkweed or Paint-brush. Cir. Cor. Agr. 



Exp. Sta. 9:10-12. 

 Whitson, A. R., et al. On weeds of the cranberry marshes. Ann. 



Rept. Wis. Agr. Exp. Sta. 1904: 233-237. 

 Wilson, James. Russian thistle. Bull. la. Agr. Exp. Sta. 26 :7. 

 Wollny, E. Untersuchungen liber den Einfluss der Unkrauter auf 



das Wachstum der Kulturpflanzen. Forsch. auf Gebiete der 



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 Wooten, E. O. New Mexico weeds. Bull. N. M. Agr. Exp. Sta. 



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 The Russian thistle. Bull. 16 :20. 



ERADICATION OF WEEDS. 



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meadows. Centrbl. Bakt. u. Par. 2 Abt. 7 :662. 1907. Abs. 



in Exp. Sta. Rec. 13 :658. 



