220 
Mycologia 
Hewitt, J. L., & Truax, H. H. An unknown apple tree disease. 
Arkansas Agr. Exp. Sta. Bull. 112: 481-491. /. 1-14. 1912. 
Howe, R. H. North American species of the genus Ramalina. 
Part I. Bryologist 16: 65-74. pi. 5-7 /. 1— 3 S 1913; Part II. 
Bryologist 16: 81-88, pi. 8, 9. N 1913; Part III. Bryologist 17: 
7-7. pi. 1, 2 f. 1, 2. F 1914; Part IV. Bryologist 17: 17-27. pi. 
5, 6 f. 1-6. Mr 1914. 
Johnson, E. C. A study of some imperfect fungi isolated from 
wheat, oat, and barley plants. Jour. Agr. Research 1 : 475-490. 
pi. 62, 63. 25 Mr 1914. 
Jones, L. R. Problems and progress in plant pathology. Am. 
Jour. Bot. 1: 97-m. Mr 1914. 
McDougall, W. B. On the mycorhizas of forest trees. Am. 
Jour. Bot. 1 : 51-74. pi. 4-7 + /. / . F 1914. 
Melhus, I. E. Powdery scab ( Spongospora subterranea ) of pota- 
toes. U. S. Dept. Agr. Bull. 82 : 1-16. pi. 1-3. 6 Ap 1914. 
Morse, W. J. Spraying experiments and studies on certain apple 
diseases in 1913. Maine Agr. Exp. Sta. Bull. 223: 1-24. /. 1-4. 
Ja 1914- 
Orton, W. A. The potato quarantine and the American potato 
industry. U. S. Dept. Agr. Bull. 81: 1-20. /. 1. 31 Mr 1914. 
Contains notes on potato diseases. 
O’Gara, P. J. A rust — new on apples, pears and other pome 
fruits. Science II. 39: 620, 621. 24 Ap 1914. 
Overholts, L. 0 . The Polyporaceac of Ohio. Ann. Missouri Bot. 
Gard. 1: 81-155. Mr 1914. 
Reed, G. M. The smuts of cereals. Missouri State Board Agr. 
Bull, io 7 : 3-15. J 1 1912. 
Roberts, J. W. Experiments with apple leaf-spot fungi. Jour. 
Agr. Research 2 : 57-66. pi. 7. 15 Ap 1914. 
Sewell, M. C. Soil bacteria. Ohio Nat. 14 : 273-278. 23 Mr 
1914. 
Stakman, E. C. A study in cereal rusts. Physiological races. 
Part I. Biologic forms. Minnesota Agr. Exp. Sta. Bull. 138: 
5-56. pi. 1-9. F 1914. 
