302 INDEX TO AMERICAN BOTANICAL LITERATURE 
Borzi, A. Studi sulle Mixoficee. Nuo. Gior. Bot. Ital. N. S. 24: 65— 
112. p I9I7 
Includes several American species of Stigonema. 
Corrected title. 
Boyce, J. S. Perennial mycelium of Gymnosporangium blasdaleanum. 
Phytopathology 8: 161, 162. 30 Ap 1918. 
Brown, W. H. The rate of growth of Podocarpus imbricatus at the 
top of Mount Banahao, Luzon, Philippine Islands. Philip. Jour. 
Sci. 12: (Bot.) 317-329. pl. 17 +f. 1, 2. N 1917. 
Carpenter, C. W. Bean spot disease. Hawaii Agr. Exp. Sta. Ext. 
Bull. 8: [1-4]ef. 7, 2. 14 Mr 1918. 
Coe, H.S. Origin of the Georgia and Alabama varieties of velvet bean. 
Jour. Am. Soc. Agron. 10: 175-179. f. 25, 26. Ap 1918. 
Collins, G. N. Tropical varieties of maize. Jour. Heredity 9: 147- 
154. f. I-3 + frontispiece. Ap 1918 
Coons, G. H. Notes on Michigan plant diseases in 1916. Ann. Rep. 
Michigan State Board Agr. 56. 310-317. 1917. 
Coons, G. H.. Oat smut. Ann. Rep. Michigan State Board Agr. 56: 
308, 309. 1917. 
Coons, G. H. A Phoma disease of celery. Ann. Rep. Michigan State 
Board Agr. 56: 318. 1917. 
Coons, G. H. The relation of weather to epidemics of late blight of 
potato. Ann. Rep. Michigan State Board Agr. 56: S17, 318. 2017: 
Coons, G. H., & Nelson, R. The plant diseases of importance in the 
transportation of fruits and vegetables. 1-60. i. 2°08. (Chicago. 
F 1918. 
Copeland, E. B. The genus Christiopteris. Philip. Jour. Sci. 12: 
(Bot.) 331-336. N 1917. 
Day, M. A. Dates of Eaton’s Ferns of North America. Rhodora 20: 
74,75. 9 Ap 1918. 
Elliott, J. A. Nematode injury to sweet potatoes. Phytopathology 8: 
169. f. 1. 30 Ap 1918. 
Emig, W. H. Travertine deposits of Oklahoma. Oklahoma Geol. 
Surv. Bull. 29: 1-76. pl. 1-15 +f. 1-5. Au 1917. 
Contains lists of plants found in these deposits. 
Evans, A. W. Noteworthy Lejeuneae from Florida. Am. Jour. Bot. 
5: 131-150. f. 1-5. 26 Ap 19018. 
Cololejeunea contractiloba, Lejeunea cladogyna, Euosmolejeunea parvula and 
Ptychocoleus heterophyllus, spp. nov., are described. 
