A List of the More Important Books and Papers Used 

 in the Preparation of This Weed Book. 



ATKINSON, GEO. F. "A College Text Book of Botany." 1005. 



BLATCHLEY, W. S. "A Catalogue of the Uncultivated Ferns and Flow- 

 ering Plants of Vigo Co., Ind." From the 21st Ann. Rep. I ml. 

 Dept. Geol. and Nat. Resources, 1SJX;. 



BRITTON, N. L. & BROWN, ADDISON. "An Illustrated Flora of the 

 Northern United States and Canada." 1896-1898. 



CHESNUT, V. K. "Thirty Poisonous Plants of the United States." 

 Farm. Bull. No. 86, U. S. Dept. Agr., 1898. 



CLARK, GEO. H. and FLETCHER, JAS "Farm Weeds of Canada." 

 1906. 



CLARK, GEO. H. "Report of the Seed Commissioner of the Dominion 

 of Canada." 1911. 



COULTER, JOHN M. "Plant Structures." 1900. 



COULTER, STANLEY. "A Catalogue of the Flowering Plants and of 

 the Ferns and their Allies Indigenous to Indiana." From the 24th 

 Ann. Rep. Ind. Dept. Geol. and Nat. Resources, 1899. 



DARLINGTON. WM. "Agricultural Botany." 1847. 



DEW^EY, L. II. "Weeds and How to Kill Them." Farm. Bull. No. 28, 

 U. S. Dept. Agr., 1905. 



GRAY, ASA. "Manual of the Botany of the Northern United States." 

 Sixth Edition, 1889. 



HALSTP:D, BYRON D. "Preliminary List of the Weeds of Iowa." 

 Bull. Bot. Dept. State Agr. Coll., Ames, la., 1888. 



IIENKEL. ALICE. "Weeds Used in Medicine." Farm. Bull. No. 188, 

 U. S. Dept. Agr., 1904. 



MACMILLAN, CON WAY. "Minnesota Plant Life." 1899. 



SELBY, A. D. "A Second Ohio Weed Manual." Bull. 175, Ohio Agr. 

 Exp. Sta., 1906. 



SHAW, THOS. "Weeds and How to Eradicate Them." 1911. 



VASEY, GEO. "Weeds of Agriculture." Reps, of Botanist in Reps. U. 

 S. Coinm. of Agr., 1886, '87, '88. 



(182; 



