INDEX TO AMERICAN BOTANICAL LITERATURE 191 
Fred, E. B. The effect of certain organic substances on seed germina- 
tion. Soil Sci. 6: 333-350. pl. 1-4. N 1918. 
Gale, W. F. Some experiments with Fucus to determine the factors 
controlling its vertical distribution. Puget Sound Biol. Sta. 
Publ. 2: 139-150. Chart 1. 26 D 1918 
Gardner, N. L. New Pacific coast marine algae—IV. Univ. Calif. 
Publ. Bot. 6: 487-496. pl. 42. 4 Ja 1919. 
Includes new species in Anabaena (1), Codium (1), Rhizoclonium (1), Hormiscia op 
Gates, R. R. A new evening primrose. Oecnothera Novae-Scotiae. 
Trans. Nova Scotian Inst. Sci. 14: 141-145. f. r, 2. 1 Au 1918. 
Gilbert, A. H., & Myer, D. S. Stem rot of clovers and alfalfa as a 
cause of ‘clover sickness.” Kentucky Agr. Exp. Sta. Circ. 8: 
46-60. pl. 7, 2: S 1915.” 
Gunthorp, H. Hay-fever and a national flower. Science II. 49: 147, 
148. 7 F 1919. 
Harris, J. A. On a chemical peculiarity of the dimorphic anthers of 
Lagerstroemia indica, with a suggestion as to its ecological 
significance. Ann. Bot. 28: 499-507. f. I, 2. Jl 1914. 
Harris, J. A. The size of the seed planted and the fertility of the plant 
produced. Am. Breeders Mag. 3: 293-295. 1912. 
Harter, L. L. The control of malnutrition diseases of truck crops. 
Virginia Truck Exp. Sta. Bull. 1: 4-16. f. 1-4. 24 S 1909. 
Hartley, C., Merrill, T. C., & Rhoads, A. S. Seedling diseases of 
conifers. Jour. Agr. Research 15: 521-558. pl. B. 9 D 1918. 
Hayata, B. Protomarattia, a new genus of Marattiaceae, and Arch- 
angiopteris. Bot. Gaz. 67: 84-92. pl. 1 +f. 1-3. 18 Ja 1919 
Protomarattia tonkinensis, Archangiopteris subintegra, and A. tamadaoensis, 
spp. nov., are described. 
Haynes, C. C. Sullivant Moss Society exchange list of Hepaticae 
found in the United States, Canada, and Arctic America. 
Bryologist 21: 87-90. 15 Ja 1919. 
Hedrick, U. P., & Booth, N. O. Mendelian characters in tomatoes. 
Proc. Soc. Hort. Sci. 1907: 19-24. . Mr 1908. 
Hendrickson, I. S. Gladioli. Jour. Internat. Gard. Club 2: 570-580. 
D 1918. [Illust.] 
Holbert, J. R., Trost, J. F., & Hoffer, G. N. Wheat scab as affected 
by systems of rotation. Phytopathology 9: 45-47. 20 Ja 1919. 
Jennings, O.E. Anannotated list of the Pteridophytes of northwestern 
Ontario. Am. Fern Jour. 8: 38-50. pl. 3. Je 1918. 

