INDEX TO AMERICAN BOTANICAL LITERATURE 419 
Fernald, M.L. Panicum § Capillaria in New England. Rhodora 21: 
110-114. Je 1919. 
Paricum Tuckermani sp. nov. is described. 
Fromme, F. D., & Wingard,.S. A. Bean rust. Virginia Agr. Exp. 
Sta. Bull. 220: 1-18. pl. 1-5. N 1918. 
Gleason, H. A. What is ecology? Torreya 19: 89-91. 9 Jl 1919. 
Graves, E. W. The botrychiums of Mobile County, Alabama. Am. 
Fern Jour. 9: 56-58. Jl 1919. 
Griffiths, D. New and old species of Opuntia. Bull. Torrey Club 46: 
195-206. pl. 9g, 10. 8 Jl 1919. 
Eight new species are described. 
Giissow, H. T. Establishment of an imperial (British) Bureau of 
Mycology. Phytopathology 9: 265. 24 Je 1919. 
Haas, A.R.C. Anesthesia and respiration. Science II. 46: 462-464. 
9 N 1917. , 
Harper, R. M. A forest reconnaissance of the Delaware Peninsula. 
Jour. Forestry 17: 546-555. My 1919. [Map] 
Haskell, R. J. Fusarium wilt of potato in the Hudson River valley, 
_ New York. Phytopathology 9: 223-260. pl. 13-15. 24 Je 1919. 
Higgins, B. B. Gum formation with special reference to cankers and 
decays of woody plants. Georgia Agr. Exp. Sta. Bull. 127: 23-51. 
pl. 1-6. + f. 1, 2. . Ja 1919. 
Higley, R. Notes on Cephaleuros virescens. Trans. Illinois Acad. 
Sci. 10: 256-258. 1917. 
Hughes, F. T. Botany in the city high schools. Torreya 19: 57-65. 
25 Je 1919. 
Hunnicutt, B. H. A forage plant from the Solanaceae family. Jour. 
Heredity 10: 185-187. f. 14, 15. 26 My 1919. 
Johnson, J. The influence of heated soil on seed germination and plant 
growth. Soil. Sci. 7: 1-103. pl. 1-8. Ja 1919. 
Johnson, J., & Hartman, R. E. Influence of soil environment on the 
rootrot of tobacco. Jour. Agr. Research 17: 41-86. pl. 1-7. 15 My 
I9IQ. 
King, C.A. Changes in teaching biology in our high schools. fee 
19: 65-71. 25 Je 1919. 
Kylin, H., & Skottsberg, C. Zur Kenntnis der subantarktischen und 
antarktischen Meeresalgen—II. Rhodophyceen. Wissenschaft- 
liche Ergebnisse der Schwedischen Siidpolar Exp. 1901-1903. 4: 
I-88. pl. 1 + f. 1-38. 1919. 
