184 INDEX TO AMERICAN BOTANICAL LITERATURE 
Roberts, J. W. Stockton Mosby McMurran. Phytopathology II: 
25,26. Ja 1921, 
With portrait. 
Robinson, B. L. The Eupatoriums of Bolivia. Contrib. Gray Herb. 
Il. 7x: 30-80. 30 D 1920. 
Further diagnoses and notes on tropical American 
Eupatorieae. Contrib. Gray Herb. II. 71: 3-30. 
19 
Includes new species in A geratum (1), Alomia (1), Riablateins (9), and Mikonia 
). 
Rose, J. N. Botanical explorations in Ecuador. 
Union 1921: 24-34. Ja 1921. 
Savelli, R. Virescente e proliferazioni in Nicotiana Tabacum e N. 
sylvestris Speg. Boll. Tecn. Tabacco 17: 247-259. pl. 1. 1920. 
Bull. Pan-American 
Schertz, F. M. A chemical and physiological study of mottling of 
leaves. Bot. Gaz. 71: 81-130. f. 1-6. 15 F 1921. 
Coleus Blumei studied. 
Scott, W. R. M., & Petry, E. N. Correlation of variation in resin 
content of Podophyllum with certain habitats. 
Ann. Rep. Michigan 
Acad. Sci. 21: 225-231. Jl 1920. 
Shear, C. L. Cranberry diseases and their control. U.S. Dept. Agr. 
Farmers’ Bull. 1081: 1-22. f. 1-12. D 1920. 
Sherff, E. E. Studies in the genus Bidens—V. Bot. Gaz. 70: 89-109. 
pl. 11-14. 21 Au 1920. 
Includes 13 new species from America and the Hawaiian Islands. 
Shive, J. W. The influence of the moisture content of sand cultures 
upon the physiological salt balance for plants. New Jersey Agr. 
Exp. Sta. Ann. Rep. 40: 358-363. 1920. 
Shive, J. W. The influence of sand of different degrees of fineness 
upon the concentration and reaction of a nutrient solution. 
Jersey Agr. Exp. Sta. Ann. Rep. 40: 363-366. 1920. 
Shunk, I. V., & Wolf, F. A. Further studies on erect blight of 
soybean. Phytopathology 11: 18-24. f. 1. Ja 1921. 
New 
~ Smith, C. P. Studies in the genus Lupinus—V. The — 
Bull. Torrey Club if 487-509. f. 53-66. 24 N 1920 
Includes 6 new varietie 
Smith, G. M. Se ae of the inland lakes of Wisconsin—I. 
Wisconsin Geol. & Nat. Hist. Surv. Bull. 57: 1-243. pl. 1-51. 
1920. 
Includes Echinosphaerella gen. nov. and new species in A phanocapsa (1), Rhizo- 
chrysis (1), Chlamydomonas (2), Volvox (1), Westella (1), Tetraeodon (1), Selenastrum 
(1), Crucigenia (1). 
