262 INDEX TO AMERICAN BOTANICAL LITERATURE 
Broadhurst, J. Self-pruning in the American elm. Torreya 17: 21- 
24.f. 2, 2. 8 Mr 1917. 
Butler, O. On the cause of alternate bearing in the apple. Bull. 
Torrey Club 44: 85-96. pl. 1-3-+ f. r. 27 F 1917. 
Byars, L. P. Tylenchus tritici on wheat. Phytopathology 7: 56, 57. 
7 F 1917. 
Cannon, W. A., & Free, E. E. The ecological oe of soil 
aeration. Science II. 45: 178-180. 23 F 1917. 
Cardiff, I. D. Twenty-sixth annual report. Washington Agr. Exp. 
Sta. Bull. 136: 1-66. f. 1-77... Ja 1917. 
Contains information relating to control of bunt of wheat and notes on other 
diseases. 
Carrier, L. The identification of grasses by their vegetative characters. 
U.S. Dept. Agr. Bull. 461: 1-30. f. 1-60. 19 Ja 1917. 
Chamberlain, C. J. Henry Harold Welch Pearson. Bot. Gaz. 63: 
150, 151. Portrait. 15 F 1917. 
Chivers, A. H. The injurious effects of tarvia fumes on vegetation. 
Phytopathology 7: 32-36. 7 F 1917. 
Clarke, F. W., & Wheeler, W. C. The inorganic constituents of 
marine invertebrates. U.S. Dept. Int. Geol. Surv. Prof. Paper 102: 
I-56. I917. : 
Pages 44-50 deal with chemical composition of calcareous algae. 
Clute, W. N. The fairy lily. Am. Bot. 23: 1-3. F 1917. [IIlust.] 
Zephyranthes carinata. 
[Clute, W. N.] Notes and comment. Am. Bot. 23: 24-31. F 1917. 
Includes notes on: The Jasmine; The Japanese lady fern; Germination of 
acorns; Color of Lilium philadelphicum; Seedless fruits and pollination. 
[Clute, W. N.] Our most fragrant flowers. Am. aay 23: 4-8. F 
1917. 
Cole, R. D. Imperfection of pollen and mutability in the genus Rosa. 
Bot. Gaz. 63: 110-123. pl. 4-6. 15 F 1917. 
Colley, R. H. Discovery of internal telia produced by species of 
Cronartium. Jour. Agr. Research 8: 329-332. pl. 88. 26 F 1917- 
Conklin, G. H. Sullivant Moss Society. Report of the hepatic de- 
partment for 1916. Bryologist 20: 13, 14. 10 F 1917. 
Conner, A. B., & Karper, R.E. The overlapping of the leaf sheath and 
its lack of value for descriptive botanical literature. Science II. 
45: 144,145. 9 F 1917. 
Cook, O. F., & Cook, A. C. Polar bear cacti. Jour. nae 8: 
113-120. f. 3-8. 27 F 1917. 
