INDEX TO AMERICAN BOTANICAL LITERATURE 49 
Seaver, F. J. Damage from soil fungi. Jour. N. Y. Bot. Gard. 18: 
186-188. 20S 1917. 
Also published in Sci. Ann. Suppl. 2184: 294. 10 N 1917. 
Selby,A. D. Diseases of wheat. Methods of control possible by seed 
treatment. Ohio Agr. Exp. Sta. Monthly Bull. 2: 219-222. Jl 
1917. 
Brief notes on Colletotrichum cereale, Fusarium roseum, Ustilago tritici and Til- 
letia foetens. 
Shear C. L., & Stevens, N. E. Studies of the Schweinitz collections of 
fungi—I. Sketch of his mycological work. Mycologia 9: 191-204. 
bl. 8, 9. 36 JL 1617. 
Sherbakoff, C. D. Fusaria of potatoes. Cornell Agr. Exp. Sta. 
Het 6: 97-270. pl. 1-7 +f. 1-51. My 1917. 
veral new ipecies and varieties described. 
pen C. D. Report of the associate plant pathologist. Florida 
Agr. Exp. Sta. Report 1916: 80 R-98 R.f. 12-16. My 1917. 
Sherbakoff, C. D. Some important diseases of truck crops in Florida. 
Florida Agr. Exp. Sta. Bull. 139: 193-277. f. 76-112. Je 1917. 
Sherff, E. E. Studies in the genus Bidens—IV. Bot. Gaz. 64: 21-41. 
17 Jl 1917. 
pines Bidens mollifolia, B. cornuta, B. leptocephala, B. Langlassei, B. a 
lifolia, B. carpodonta, B. pseudalausensis, B. Brandegeet and B. Holwayi, spp. 
Shimek, B. The plant geography of the Lake Okoboji region: me 
Bull. Lab. Nat. Hist. Univ. Iowa 7‘: 3-5. O 1917. 
tional notes. 
Bull. Lab. Nat. Hist. Univ. 
Shimek, B. The sand flora of Iowa. 
Iowa 74: 6-24. pl. 1-5. O 1917. 
Shufeldt, R. W. Forms of leaves. Am. Forest. 23: 412, 413. Jl 1917. 
[Illust.] 
Shufeldt, R. W. Midsummer flowers. Am. Forest. 23: 403-406. f. 
r-5., Jl 1917. 
Shufeldt, R. Ww. Remarkable buttonballs. 
2 As A 
Shufeldt, R. iv oe flowers that boys and girls should know. Am. 
Forest. 23: 474-480. f. 1-20. Au 1917. 
Shull, G. H. Pitcher-leaved ash trees. Jour. Heredity 8: 431. f. ro. 
S 1917. 
Siggers, P. V. Some cultural characteristics of Pestalozzia funera 
Desm. Rep. Michigan Acad. Sci. 17: 141. pl. 12. 1916. 
Sladen, F. W. L. Some investigations of the honey flora in Ontario. 
Ann. Rep. Beekeepers Assoc. Ontario 37: 31, 32. 1917. 
Small, J. K. The earciaale walnut, oe: N. Y. Bot. Gard. 18: 186. 
pl. 203, 204. 20S 1917. 
Jour. Heredity 8: 310. 
