124 INDEX TO AMERICAN BOTANICAL LITERATURE 
Frye, T. C. Illustrated key to the western Ditrichaceae. Bryologist 
20: 49-60. pl. I-19. 15 Au I917. 
Gaines, E. F. Inheritance in wheat, barley and oat hybrids. Wash- 
ington Agr, Exp. Sta. Bull. 135: 1-61. f. 1-9. Mr 1917. 
Garman, H. A bean disease introduced in diseased seeds. Kentucky 
Agr. Exp. Sta. Circ. 16: 91-95. f. zr. Jl 1917. 
Anthracnose. 
Gilbert, A. H., & Bennett, C. W. Sclerotinia trifoliorum, the cause of 
stem rot of clovers and alfalfa. Phytopathology 7: 432-442. f. 1-5. 
4 i) 19%7. 
Gourley, J. H. Some observations on the growth of apple trees. New 
Hampshire Agr. Exp. Sta. Bull. 12: 1-38. charts 1-9. Jl 1917. 
Greenman, J. M. Two exotic Compositae in North America. Ann. 
Missouri Bot. Gard. 4: 289-292. pl. 19. N 1917. 
Grier, N. M. New forms of Calamites. Am. Mid. Nat. 5: 147-150. 
pt. 2-3, N 1987, 
Includes Calamites Fettermanni, C. multifoliotus, and C. cruciatus Harrisoni, 
spp. nov. 
Grier, N. M. Note on fruit of mountain magnolia. Rhodora 19: 
anG, 5 LD igt?. 
Giissow, H. T. The occurrence of Colletotrichum cereale, Dothichiza 
populea and Leptosphaeria napi in Canada. Phytopathology 7: 
450," 3 D:t017; 
Halsted, B. D., & Owen, E. J- Environment of seeds and crop pro- 
duction. Plant World 20: 294-297. S$ 1917. 
Hanson, H.C. Leaf-structure as related to environment.. Am. Jour. 
Bot. 4: 533-560. f. I-20. 24 N 1917. 
Harger, E. B., and others. Additions to the flora of Connecticut. 
Rhodora 19: 224-232. 21 N; 245-253. 5 D 1917. 
Harper, R. M. Some North Carolina soil statistics and their signific- 
ance. Jour. Elisha Mitchell Sci. Soc. 33: 106-1 19. N 1917. 
Harris, J. A. On the distribution of abnormalities in the inflorescence 
of Spiraea Vanhouttei. Am. Jour. Bot. 4: 624-636. pl. 30, 31 + 
J. 4. 12'D 10917. 
Harris, J. A. Sunspots, climatic factors and plant activities. Am. 
Nat. 51: 761-764. D 1917. 
Hendershot, L. B. The white or American elm. Nature Study Rev. 
13: 298-301. O 1917. 
Henry, J. K. Alberni notes. Ottawa Nat. 31: Bese. 0E N 1Gi7, 
H W. An avocado monstrosity. Jour. Heredity 8: 557. 
Jf. 'D 1917. 
