600 INDEX TO AMERICAN BOTANICAL LITERATURE 
Weir, J. R. Keithia thujina, the cause of a serious leaf disease of the 
western red cedar. Phytopathology 6: 360-363. f. z, 2. 125 1916. 
Weir, J. R., & Hubert, E. E. Successful inoculations of Larix occi- 
dentalis and Larix europea with Melampsora bigelowii. Phyto- 
pathology 6: 372, 373. 12S 1916, 
Wester, P. J. Plant propagation in the tropics. Philippine Dept. 
Pub. Inst. Agr. Bur. Bull. 32: 1-87. pl. 1-12 + f. I-40. 1916. 
Whetzel, H. H., and others. Ginseng diseases and their control. 
U. S. Dept. Agr. Farmers’ Bull. 736: 1-22. f. 1-26. 17 Jl 1916. 
White, O. E. Inheritance studies in Piswm—I. Inheritance of coty- 
ledon color. Am. Nat. 50: 530-547. S 1916. 
Willis, M. A. A root disease of prunes. Phytopathology 6: 368, 369. 
12 S 1916. 
Wilson, P. Crinum americanum. Florida swamp lily. Addisonia 1: 
21. pl. 11. 30 Je 1916. 
Wilson, W. J. Palaeobotany. Summary Report, Dept. Mines Canada 
Geol. Surv. 1915 Sessional paper 26: 205-209. 1916. 
Wuist,E.D. Branched prothallia in the Polypodiaceae. Bull. Torrey 
Club 43: 365-383. f. r-15. 12 Au 1916. 
Wyatt, F.A. Influence of calcium and magnesium compounds on plant 
growth. Jour. Agr. Research 6: 589-620. pl. 84-88. 17 Jl 1916. 
Yampolsky, C. Observations on inheritance of sex-ratios in Mercurialis 
annua. Mem. N. Y. Bot. Gard. 6: 69-74. 31 Au 1916. 
Zimmerman, C. Contribuicio para o estudo das Diatomaceas dos 
Estados Unidos do Brazil. Broteria 13: 37-56. 1 Ap 1915. 
Zimmerman, H. E. The licorice plant. Am. Bot. 22: 43, 44. My 
1916. [Illust.] 
Zoller, H. F. The bromine content of Puget Sound Nereocystis (Giant 
kelp). Science II. 44: 358, 359. 8 S 1916. 
