INDEX TO AMERICAN BOTANICAL LITERATURE 365 
Fred, E. B., & Graul, E. J. The gain in nitrogen from growth of legumes 
on acid soils. Wisconsin Agr. Exp. Sta. Research Bull. 39: I-42. | 
pl. 1, 2+f. 1-16. O 1916. 
Galloway, B. T. Newton B. Price. Phytopathology 7: 143, 144. Ap 
1917. 
Gates, R.R. A revision of the genus Polygonatum in North America. 
Bull. Torrey Club 44: 117-126. pl. 4-6. 27 Mr 1917 
Greenman, J. M. Monograph of the North and Central American 
species of the genus Senecio—Part II. Ann. Missouri Bot. Gard. 
4: 15-36. pl. 4. F 1917. 
Four new species are described. : 
Hansen, A.A. Natural dwarfing. Jour. Heredity 8: 160-162. f. 4, 5- 
Ap 1917. 
Harper, R. M. Some undescribed prairies in northeastern Arkancas. 
Plant World 20: 58-61. f. 1, 2. F 1917. 
Harrington, W. H. Notes on some Ottawa district plants. Ottawa 
Nat. 30: 133-143. F 1917. 
Harris, J. A. The application of correlation formulae to the problem 
of varietal differences in disease resistance: data from the Vermont 
experiments with potatoes. Am. Nat. 51: 238-244. Ap 1917. 
Harvey, R.B. A method for producing conductivity water suitable for 
water culture experiments. Bot. Gaz. 63: 321, 322. feck si AD 
1917. 
Herrera, A. L., & Nufiez, A. S. Nuevas observaciones acerca de la 
siliza caloide solidificada. Bol. Dir. Estud. Biol. 1: 632-636. f. I-3- 
S 1916. 
“‘Estructuras de diatomeas y de trejidos vegetales.”’ 
Humphrey, H. B. Puccinia glumarum. Phytopathology 7: 142, 143. 
Ap 1917. 
Jones, D. F. Dominance of linked factors as a means of accounting 
for heterosis. Proc. Nat. Acad. Sci. 3: 310-312. 15 Ap 1917. 
Jones, L. R. Lightning injury to kale. Phytopathology 7: 140-142. 
rt. Ap1gt7: 
Kenoyer, L. A. Environmental influences on nectar secretion. Bot. 
Gaz. 63: 249-265. 16 Ap 1917. 
Kligler, I. J. The evolution and relationship of the great groups of 
bacteria. Jour. Bacteriology 2: 165-176. Mr 1917. 
Lee, H. A. A new bacterial citrus disease. Jour. Agr. Research g: 1-8. 
A 1,2: 2 Bpagi}: 
