334 INDEX TO AMERICAN BOTANICAL LITERATURE 
Rydberg, P. A. (Rosales) Fabaceae. Psoraleae. N. Am. Fl. 24: 
1-64. 25 Ap 1919 
Includes Hotta, a a Psoralidium, Pediomelum, Psorobatus, Psoroden- 
dron, Psorothamnus, and new species in Hoita (4), Psoralidium (1), Pedio- 
melum (7), Amorpha an Baeuadee (2), Psorothamnus (4), and Parosela (8). 
Schneider, C. Notes on American willows—IV. Species and varieties 
of section longifoliae. Bot. Gaz. 67: 309-346. 18 Ap 1919. 
Several new varieties are described. 
Shear, C. L. First decade of the American Phytopathological Society. 
Phytopathology 9: 165-170. 2 Ap 1919. 
Shufeldt, R. W. Mandrakes, wild lupine, and notes on American 
snapping turtle. Am. Forestry 25: 995-1000. f. 1-9. Ap 1919. 
Skinner, J. J.. & Reid, F. R. The influence of phosphates on the 
action of alpha-crotonic acid on plants. Am. Jour. Bot. 6: 167-180. 
f. I-9.. 1 My 1919. 
Smith,G. M. A second list of algae found in Wisconsin lakes. Trans. 
Wisconsin Acad. Sci. 19: 614-654. pl. 10-15. 
Includes the new genus Plankiosphaeria and new species in Piniksepiers (1), 
Asterococcus (1), Oocystis (1), Tetraedron (1), Characium (1), and Chlorolotrys (1). 
Stakman, E. C., Levine M. N., & Leach, J.G. New biologic forms of 
Puccinia graminis. Jour. Agr. Research 16: 103-105. 20 Ja 1919. 
Standley, P. C. A neglected Solidago name. Rhodora 21: 69, 70: 
14 Ap 1919. 
Stevens, N. E. Keeping quality of strawberries in relation to their 
temperature when picked. Phytopathology9: 171-177. 2Ap 1919. 
Stevenson, J. A. A check list of Porto Rican fungi and a host index. 
Jour. Dept. Agr. Porto Rico. 2: 125-264. Jl 1918. 
Stout, A.B. Bud variation. Proc. Nat. Acad. Sci. 5: 130-134. f. 18. 
Ap I9g19. 
Tisdale, W. H. Physoderma disease of corn. Jour. Agr. Research 16: 
137-154. pl. A, B, to-17 +f. 1. 3F 1919 
Tottingham, W. E. A preliminary study of the influence of chlorides 
on the growth of certain agricultural plants. Jour. Am. Soc. 
Agron. 11: 1-32. Ja 1919. 
Transeau, E. N., & Tiffany, H. New Oedogoniaceae. Ohio. Jour. 
Sci. 19: 240-242. pl. 14. F 19109. 
O. hystricinum and Bulbochaete Bullardi, spp. nov., are described. 
Van Fleet, W. New everbearing strawberries. Jour. Heredity 10: 
14-16. f. 6,7. 8 Mr 1919. 
