460 INDEX TO AMERICAN BOTANICAL LITERATURE 
Detwiler, S. B. The sugar pine. Identification and characteristics. 
Am. Forest. 23: 280-283. My 1917. [Hllust.] 
Duggar, B. M., Severy, J. W., & Schmitz, H. Studies in the physiology 
of the fungi. IV. The growth of certain fungi in plant decoctions. 
Ann. Missouri Bot. Gard. 4: 165-173. f. 1-4. Ap 1917. 
Fallis, A. L. Growth in some Laminariaceae. Puget Sound Marine 
Sta. Publ. 1: 137-155. pl. 25-28. 15 Ap 1916. 
Fawcett, H. S. The geographical distribution of the Citrus diseases, 
melanose and stem-end rot. John Hopkins Univ. Circ. 293: 190- 
193. Mr 1917. 
Fawcett, H.S. Preliminary note on the relation of temperature to the 
growth of certain parasitic fungi in cultures. Johns Hopkins Univ. 
Circ. 293: 193, 194. Mr 1917. 
Free, E. E. The effect of aeration on the growth of buckwheat in 
water-cultures. Johns Hopkins Univ. Circ. 293: 198, 199. Mr 
1917. 
Free, E. E. Symptoms of poisoning by certain elements, in Pelar- 
gonium and other seen Johns Hopkins Univ. Circ. 293: 195-198. 
Mr 1917. : 
Free, E. E., & Trelease, S. F. The effects of certain mineral poisons 
on young wheat plants in three-salt nutrient solutions. Johns 
Hopkins Univ. Circ. 293: 199-201. Mr 1917. 
Freiberg, G. W. Studies in the mosaic diseases of plants. Ann. 
Missouri Bot. Gard. 4: 175-232. pl. rg—-17. Ap 1917. 
Gano, L. A study ia physiographic ‘ecology in northern Florida. 
Bot. Gaz. 63: 337-372. f. I-10. 16 My 1917. 
Gates, R.R. The search for variations. Lorquinia 1: 29, 30. N 1916. 
Graves, A.H. Botany at a modern college. Connecticut Col. Bull. 2: 
I-13. 15S 1916. 
Griggs, R. F. The effect of the eruption of Katmai on land vegetation, 
| Bull. Am. Geog. Soc. 47: 193-203. f. I-10. Mr 1915. 
Grinnell, F., Jr. Plant response to weather conditions. Lorquinia I: 
25, 26. N 1916. 
Halsted, B. D. Report of the department of botany. New Jersey 
Agr. Exp. Sta. Report 1915: 261-296. pl. 1-14. 1916. 
Harris, J. A., & Lawrence, J. V. The osmotic concentration of the 
sap of the leaves of mangrove trees. Biol. Bull. 32: 202-211. 
Mr 1917. 
