INDEX TO AMERICAN BOTANICAL LITERATURE 317 
Fawcett, H. S., Horne, W. T., & Camp, A. F. Citrus blast and 
black pit. Univ. California Agr. Exp. Sta. Techn. Pap. 5: 
1-24. pl. 1-6. My 1923. 
Fernald, M. L., & Wiegand, K. M. Notes onsome plants of the 
Ontario and St. Lawrence basins, New York. Rhodora 25: 
205-214. D 1923. 
Garner, W. W., McMurtrey, J. E., Bacon, C. W., & Moss, E. G. 
Sand drown, a chlorosis of tobacco due to magnesium de- 
ficiency, and the relation of sulphates and chloride of 
potassium to the disease. Jour. Agr. Research 23: 27-40. 
pl. 1-7. 6Ja1923. 
Geitler, L. Der Zellbau von Glaucocystis Nostochinearum und 
Gloeochaete Waittrockiana und die Chromatophoren-Sym- 
biosetheorie von sictene cine Arch. Protistenk. 47: 
1-24. f. 1-8. 8 N 1923. 
Godfrey,G. H. A Phytophthora tater of asi oe Agr. 
Research 23: 1-26. pl. 1-12 + f. 1-3. 6Jaig 
Goodspeed, T. H. A preliminary note on the east of 
Nicotiana species and hybrids. Svenska Bot. Tidskr. 17: 
472-478. 5: 2;2. “4004. 
Greenman, J. M. Studies of South American Senecios—I. 
Ann. Missouri Bot. Gard. 10: 73-98. F 1923. 
Includes 13 new species. 
Hakansson, A. Studien iiber die Entwicklungsgeschichte der 
Umbelliferen. Lunds Univ. Arsskr. II 2: 187: 1-120. pl. r + 
fo 78. 1923, 
Haley, D. E. Availability of potassium in orthoclase for plant 
nutrition. Soil Sci. 15: 167-180. Mr 1923. 
Hall, H. M., & Clements, F. E. The phylogenetic method in 
taxonomy.—The North American species of Artemisia, 
Chrysothamnus, and Atriplex. Carnegie Inst. Washington 
Publ. 326: 1-356. pl. 1-58 +f. 1-47. 20 Jl 1923. 
Harrington, G.T. Forcing the germination of freshly harvested 
wheat and other cereals. Jour. Agr. Research 23: 79-100. 
43 Ja 1923. 
