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PAPERS ON BOTANY 143 
Britton, N. L. and Brown, A. Illustrated Flora of the North- 
ern United States and Canada. 
Brown, Edgar and Hillman, F. H. The Seeds of the Blue 
Grasses. Bull. 84 of Bureau of Plant Industry, U. 8. D. A. 
Clark, G. H. and Fletcher, Jas. Farm Weeds of Canada. 
Ottawa, 1906. 
Cox, H. R. Controlling Canada Thistle, U. 8. Dept. Agricul- 
ture, Farmers Bull. 548, 1913, Washington, D. C. 
Dewey, L. H. Weeds and How to Kill Them. U.S. Dept. Agri- 
culture, Farmers Bull. 28, 1895, Washington, D. C. 
Garman, E. On Adulterant and Weed Seeds in Kentucky 
Samples of Blue Grass and Alfalfa. Bull. 124, Kentucky 
Agricultural Experiment Station, 1906. Lexington, Ky. 
Garman, H. and Didlake, M. L. The Imperfections of Seeds 
under the Kentucky Pure Seed Laws. Bull. 127, Kentucky 
Agricultural Experiment Station, 1906. Lexington, Ky. 
Georgia, Ada E. A Manual of Weeds. The Macmillan Com- 
pany, New York. 
Robinson, B. L. and Fernald, M. L. Gray’s New Manual of 
Botany. Seventh Edition. 
Hitchcock, A. S. A Text Book of Grasses. 
Hillman, F. H. Testing Farm Seeds in the Home and in the 
Rural Schools. U.S. Dept. of Agriculture, Farmers Bull. 
428, 1911, Washington, D. C. 
Hillman, F. H. The Adulteration of Forage Plant Seed. U.S. 
Dept. of Agriculture, Farmers Bull. 382, 1909. Washing- 
ton, D. C. 
Moorhouse, L. A. and Burleson, W. L. Alfalfa Seed in Okla- 
homa, Bull. 83, Oklahoma Agricultural Experiment Sta- 
tion, 1909, Stillwater, Oklahoma. 
Oakley, R. A. and Westover, H. L. Purity of Alfalfa Seed. U. 
S. Dept. of Agriculture. Farmers Bull. 757, 1916. Wash- 
ington, D. C. 
Oswald, W. L. Minnesota Weeds. Bull. 129, Agricultural Ex- 
periment Station, 1913. St. Paul, Minn. 
