INDEX TO AMERICAN BOTANICAL LITERATURE 349 
Fernald, M. L. Rosa blanda ees its allies of northern Maine and ad- 
jacent Canada. Rhodor : 90-96. 1 My 10918. 
Rosa johannensis and _R. se ant spp. nov., are described. 
Freeman, G. F. Producing bread making wheats for warm climates. 
Jour. Heredity 9: 211-226. f. 12-16. 25 My 1018. 
Gates, R.R. A systematic analytical study of certain North American 
Convallariaceae, considered in regard to their origin through dis- 
continuous variation. Ann. Bot. 32: 253-257. Ap 1918. 
Gleason, H. A. The local distribution of introduced species near 
Douglas Lake, Michigan. Torreya 18: 81-89. 4 Je 1918. 
Hall, H. M. Walnut pollen as a cause of hay fever. Science II. 47: 
516, 517. 24 My 1918. 
Hansen, A. A. Preserving our wild flowers. Torreya 18: 65-69. 
8 My 1918. 
Harper, R. M. Changes in the forest area of New England in three 
centuries. Jour. Forestry 16: 442-452. f. 7. Ap 1918. 
House, H. D. Report of the state atone: 1916. N. Y. State Mus. 
Bull. 197: 1-122. f. 1-12. 1 My 
Includes new species’in Cercospora (1), Rae (1), Cryptospora (1), Crypto- 
sels (1), Dendrodochium (1), Diplodia (2), Eutypella (1), Gloeosporium (1), Lepto- 
Sphaeria (1), caincnaonoinents (1), Microdiplodia (1), Phoma (1), Ramularia (1), Septoria 
(3); Spaleee is (3). 
Humbert, E. P. A striking variation in Silene noctiflora. Bull. Torrey 
Club 45: 157, 158. f. Z, 2. 1 My 1918. 
Humbert, J. G. Tomato diseases in Ohio. Ohio Agr. Exp. Sta. Bull. 
321: 159-196. f. r-r2.  F. 1918... [Ilust.] 
Humphrey, H. B., & Potter, A.A. Cereal smuts and the disinfection of 
~ seed grain. U. S. Dept. Agr. Farm. Bull. 939: 1-28. f. 1-16. 
Ap 1918. 
Husmann, G. C. Girdling the Corinth grape to make it bear. Jour. 
Heredity 9: 201-210. f. s-rz. 25 My ro18. 
Ishikawa, M. Studies on the embryo sac and fertilization in Oenothera. 
Ann. Bot. 32: 279-317. pl. 7 +f. 1-14. Ap 1918. 
_ Jensen, G. H. Studies on morphology of wheat. Washington Agr. 
Exp. Sta: Bull. 150: 1-21. pl. 1-5. Mr 1918. 
Jensen, L. P. A plea for the preservation of our native plants. Gard. 
_ Chrom. Am. 22: 147-149. My 10918. 
Jones, F.R. Yellow-leafblotch of alfalfa caused by the fungus Pyreno- 
peziza medicaginis. Jour. Agr. Research 13: 307-330. . DD, 25, 
(_<o 6 My 1018. 
