INDEX TO AMERICAN BOTANICAL LITERATURE 281 
Cook, M. T. Potato diseases in New Jersey. New Jersey Agr. Exp. 
Sta. Circ. 105: 1-38. f. 1-19. Ja 1919. 
Cook, M. T. Report of the department of plant pathology. New 
Jersey Agr. Exp. Sta. Ann. Rep. 38: 523-563. pl. 1-6. 
Cook, M. T., & Helyar, J. P. Diseases of grains and forage crops. 
New Jersey Agr. Exp. Sta. Circ. 102: 1-16. f. 1-4. 7 N 1918. 
Cordero, M. Prolegomenos para e! estudio analitico del agave. Bol. 
Dir. Est. Biol. Mexico 2: 235-240. Jl 1917. [Illust.] 
Deane, W. Amsinckiain New England. Rhodora 21: 38-40. 25 Mr 
1919. 
Detmers, F. Two new varieties of Acer rubrum L. Ohio Jour. Sci. 
19: 235-237. pl. 12, 13. F 1919. 
Dodge, C. W. Tyrosin in the fungi; chemistry and methods of study- 
ing the tyrosinase reaction. Ann. Missouri Bot. Gard. 6: 71-92. 
F-¥e F919: 
Dorety, Sr. H. A. Embryo and seedling of Dioon spinulosum. Bot. 
Gaz. 67: 251-257. pl. ro-rz. 18 Mr 1919. 
Duggar, B. M. & Dedge,C. W. The use of the colorimeter in the indi- 
cator method of H ion determination with biological fluids. Ann. 
Missouri Bot. Gard. 6: 61-70. f. z. F. 1919. 
Fairchild, D. Testing new foods. Jour. Heredity 10: 17-28. f. 
o-13- 8 Mr 1919. 
Fawcett, W., & Rendle, A. B. Notes on Jamaica plants. Jour. Bot. 
57: 65-68. 
Phyllanthus minor, P. inaequaliflorus and P. Coxianus, spp. nov., are described. 
Fernald, M. L. Carex flava, var. gaspensis in Vermont. Rhodora 
21:40. 25 Mr 1919. 
Fernald, M.L. Helianthemum Bicknelliiand H. propinquum. Rhodora 
217.46, a7~: 25.Mr 1919. 
Fromme, F. D., & Murray, T. J. Angular-leafspot of tobacco an un- 
described bacterial disease. Jour. Agr. Research 16: 219-228. 
pt. 25-27. 24 F 1919: 
Bacterium angulatum sp. nov. 
Gager, C. S. Horticulture as a profession. Science II. 49: 293-300. 
28 Mr 1919. 
Garrett, A. O. Spring flora of the Wasatch region. i-xii + 1- 
106. Salt Lake City, 1911; i-xii + 1-139. Lancaster. 1912; i-xii + 
1-144. Lancaster. 1917. 
First, second and third editions. 
