476 INDEX TO AMERICAN BOTANICAL LITERATURE 
Shamel, A. D., Scott, L. B., & Pomeroy, C. S. Citrus- fruit improve- 
ment: a aiaiy of bud variation in the Valencia orange. GS 
Dept. Agr. Bull. 624: 1-120. pl. 1-14 + f. 1-9. 25 Jl 1918. 
Shive, J. W., & Martin, W. H. A comparative study of salt require- 
ments for young and for mature buckwheat plants in solution cul- 
tures. Jour. Agr. Research 14: 151-175. f. 1-3. 22 Jl 1918. 
Shufeldt, R. W. Flower and other studies for the summer of 1918. 
Am. Forestry 24: 433-438. f. r-zz. Jl 1918. 
Stakman, E. C., Parker, J. H., & Piemeisel, F. J. Can biologic forms 
of stemrust on wheat change rapidly enough to interfere with 
breeding for rust resistance? Jour. Agr. Research 14: I1I—124. 
Pi T7277. LOTS. 
Stewart, V. B. Exclusion legislation and fruit tree production. Phy- 
topathology 8: 360-364. 17 Jl 1918. 
Sutton, J. M. Flora of the Detroit zoological tract. Ann. Rep. 
Michigan Acad. Sci. 19: 263-271. f. 13. 1917. 
Tanaka, T. Notes on some fungous diseases and a new coddling moth 
attacking the persimmon in Japan. Month. Bull. State Comm. 
Hort. Calif. 7: 461-463. Jl 1918. 
Taylor, N. Effects of the severe winter on the woody plants in the 
Garden. Brooklyn Bot. Gard. Rec. 7: 83-87. Jl 1918. 
Teesdale, C. H., & MacLean, J.D. Tests of the absorption and pene- 
tration of coal tar and creosote in longleaf pine. U.S. Dept. Agr. 
Bull. 607: 1-42. pl. 1-11 + f. 1-14. 7 Je 1918. 
Van Pelt, W. Some important clover diseases in Ohio. Month. Bull. 
Ohio Agr. Exp. Sta. 3: 239-243. f. 1, 2. Au 1918. 
Waterman, W. G. Ecology of northern Michigan dunes: Crystal 
Lake Bar region. Ann. Rep. Michigan Acad. Sci. 19: 197-208. 
pl. 6-11 +f. O-1I. 1917. 
Waugh, F. W. Wild plants as food. Seevws Nat. 32: 2-6. f. 1-7: 
Ap 1918. 
Waynick, D. D. The chemical composition of the plant as further 
proof of the close relation between antagonism and cell permeability. 
Univ. Calif. Publ. Agr. Sci. 3: 135-240. pl. 13-24 +f. 1-26. 12Jl 
1918. 
Wiegand, K. M. Some species and varieties of Elymus in eastern 
North America. Rhodora 20: 81-90. 1 My 1918. 
Elymus riparius sp. nov. is described. 
Wiegand, K.M. A new variety of Triosteum aurantiacum. Rhodora 
20: 116. 11 Je 1918. 
