INDEX TO AMERICAN BOTANICAL LITERITURE 395 
McAlpine, D. Bitter pit in apples and pears: the latest results 
in preventive measures. Phytopathology 11: 366-370. 
a7 Ja 1922, 
McDougall, W. B. Biller my! : Drastic trees. Jour. For. 
20: 255-260. f. 1-3. Mr 
McDougal, W. B. Symbiosis in a deciduous forest. I. Bot. 
Gaz. 73: 200, 212. f. 1-3. M 1922. 
McKinney, H. H., & Johnson, A. G. Wojnowicia graminis (Mc- 
Alp.) Sacc. & D. Sacc. on wheat in the United States. 
Phytopathology 11: 505, 506. 21 Mr 1922. 
Meade, R. M. Positions and movements of cotton leaves. 
Jour. Hered. 12: 444-448. f. 7-9. D 1921. 
Meister, G. K. Natural hybridization of wheat and rye in 
Russia. Jour. Hered. 12: 467-470. D 1921 
Merl, E. M. Biologische Studien uber die Utriculariablase. 
Flora 115: 59-74. f. 1-3. 1922. ; 
Millar, W. N. Status of forestry in Western Canada. Jour. 
For. 20: 10-17. Ja 1922. 
Moore, B. Humus and root systems in certain northeastern 
forests in relation to reproduction and competition. Jour. 
For. 20: 233-254. Mr 1922. 
Moore, B. Influence of certain soil factors on the growth of 
tree seedlings and wheat. Ecology 3: 65-83. II f.1-6. Ja 
1922. 
Mulford, F. L. Broad-leaved evergreen shrubs for the South. 
Am. For. 28: 99-104. F 1922. [Illust.] 
Murphy, P. A. The sources of infection of potato tubers with 
the blight fungus, Phytophthora infestans. Sci. Proc. 
Royal Dublin Soc. 16: 353-368. pl. 11-14. Au 1921. 
Experimentss conducted in Canada. 
Murrill, W. A. A fragrant polypore. Mycologia 14: 46, 47. 
6 Mr 1922. 
Trametes suaveolens. 
