502 INDEX TO AMERICAN BOTANICAL LITERATURE 
Shaw, C. H. The vegetation of the Selkirks. Bot. Gaz. 61: 477-494. 
Maps. 15 Je 1916. 
Paper compiled by Miss Caroline S. Romer. 
Sherff, E.E. Studies in the genus Bidens. III. Bot. Gaz. 61: 495-506. 
pl. 32. 15 Je 1916. 
Includes Bidens Andrei, B. attenuata, and B. mirabilis, spp. nov. 
Shreve, F. Experimental work at Cinchona. Science II. 43: 919. 
30 Je 1916, 
Smith, E. F. Studies on the crown gall of plants; its relation to human 
cancer. Jour. Cancer Research 1: 231-309. pl. 1-25. Ap 1916. 
Smith, E. F. Further evidence that crown gall of plants is cancer. 
Science IT. 43: 871-889. 23 Je 1916. 
Spaulding, P. The white-pine blister rust. U.S. Dept. Agr. Farmers’ 
Bull. 742: 1-15. pl. r+-f. 1-4. 9 Je 1916. 
Stakman, E. C., & Tolaas, A. G. Fruit and vegetable diseases and 
their control. Minnesota Agr. Exp. Sta. Bull. 153: 7-67. f. 1-32. 
Ja 1916. 
Stakman, E. C., & Tolaas, A. G. Potato diseases and their control. 
Minnesota Agr. Exp. Sta. Bull. 158: 7-47. f. 1-28. F 1916. 
Standley, P. C. The ferns of Greene County, Missouri. Am. Fern 
Jour. 6: 44-51. Je 1916. 
Stapf, O. Saxegothaea conspicua. Curt. Bot. Mag. IV. 12: pl. 8664. 
Je 1916. : 
A plant from Chile. 
Stevens, F. L. Collecting. plants in Porto Rico. Jour. N. Y. Bot. 
Gard. 17: 82-85. 14 Jl 1916. 
Stevens, N. E. Pathological histology of strawberries affected by 
species of Botrytis and Rhizopus. Jour. Agr. Research 6: 361-366. 
pl. 49, 50. 5 Je 1916, 
St. John, H. -A revision of the North American species of Potamogeton 
of the section Coleophylli. Rhodora 18: 121-138. 1 Je 1916. 
Sturgis, W. C. Notes on the Myxomycetes of the Curtis Herbarium, 
Mycologia 8: 199-213. -15 Jl 1916. 
Surface, F. M. Studies on oat breeding. III. On the inheritance of 
certain glume characters in the cross Avena fatua X A. sativa vat- 
kherson. Genetics 1: 252-286. pl. 2, 3. My 1916. 
Surface, F. M., & Zinn, J. Studies on oat breeding. IV. Pure line 
varieties. Maine Agr. Exp. Sta. Bull. 250: 97-148. f. 14-24. My 
1916. 
