INDEX TO AMERICAN BOTANICAL LITERATURE 47 
freezing-point method for the determination of the osmotic pressure 
of plant sap. Rep. Michigan Acad. Sci. 18: 47, 48. 1916. 
[Abstract.] 
‘ Hedgcock, G. G., & Hunt, N.R. Notes on Razoumofskya campylopoda. 
Phytopathology 7: 315, 316. 7S 1917. 
Higgins, J. E. The litchi in Hawaii. Hawaii Agr. Exp. Sta. Bull. 44: 
I-21... pl. 7-§. 27 Jl-4917. 
Hitchcock, A. S., & Chase, A. Grasses of the West Indies. Contr. 
Ve S. Nat. Herb. 18: i-xviii seal Meath 18 Au 1917. 
ncludes descriptions of the new genus Saugetia and 11 new species in Saugetia 
Ci); gona (1), Paspalum (5), Raddia (2), Spieigcs (1), and Thrasya (1), and 
several new combinations. 
. Hollinger, A. Does the movement of air affect the growth of plants? 
Rep. Michigan Acad. Sci. 17: 159, 160. 1916. 
[Abstract] 
Hottes, A. C. Gladiolus studies—I. Botany, history and evolution 
of the Gladiolus. Cornell Extension Bull. 9: 93-188. f. z-9. D 
1916; II. Culture and hybridization of the Gladiolus. Cornell 
Extension Bull. 10: 195-271. f. ro-38. D 1916; III. Varieties of 
the garden Gladiolus. Cornell Extension Bull. 11: 277-451. f. 39-68. 
D 1916. 
House, H. D. The Peck testimonial exhibit of mushroom models. 
Science II. 46: 204. 31 Au 1917. 
House, H. D. Photographing wild flowers. Kodakery 4: 10-13. Jl 
1917. [Illust.] 
Howitt, J. E. Phytophthora infestans, causing damping-off of tomatoes. 
Phytopathology 7: 319. 7S 1917. 
Hurd, A. M. Winter condition of some Puget Sound algae. Puget 
Sound Mar. Sta. Publ. 1: 341-348. 10 Au 1917. 
Hurst, B. Peloria flowers on ivywort or ivy-leaved toadflax. Ottawa 
Nat. 31: 45. Jl 1917 
Kauffman, C. H. Uinveborind Michigan fungi for 1911, 1912, 1913, and 
1914. Rep. Michigan Acad. Sci. 17: 194-223. 1916. 
Kenoyer, L. A. Environmental influences of nectar secretion. Iowa 
Agr. Exp. Sta. Research Bull. 37: 219-232. N 1916. 
Levin, E. Light and pycnidia formation in the Sphaeropsidales. Rep. 
Michigan Acad. Sci. 17: 134, 135- 1916. 
MacDougal, D. T. To increase the yield of food. N. Am. Review 
206: 62-69. “Jl” [Je] 1917. 
Mains, E.B. Some factors concerned in the germination of rust spores. 
Rep. Michigan Acad. Sci. 17: 136-140. 1916. 
Markle, M. S. Root systems of certain desert plants. Bot. Gaz. 64: 
177-205. f. I-33. 15 S 1917. 
