488 INDEX TO AMERICAN BOTANICAL LITERATURE 
Smith, E. F., & McCulloch, L. Bacterium solanacearum in beans. 
Science IT. 50: 238. 5S 1919. 
Segazzini, C. Relique mycologicae tropical. Bol. Acad. Nac. Cien. 
Cérdoba 23: 365-609. 1919. 
Includes a number of new species in various genera. 
Stakman, E.C. The black stem rust and the barberry. Yearbook 
U.S. Dept. Agr. 1918: 75-100. pl. 1-9 + f.7. 1919. 
Standley, P. C. Studies of tropical American phanerogams. No. 3 
Contr. U. S. Nat. Herb. 20: 173-220. 1919. 
Includes the new genus Randia and 65 new species in various genera. 
Stevens, F. L., & Dalbey, N. A parasite of the tree fern ( Cyathea). 
Bot. Gaz. 68: a ‘a 35, 16... 16:3 1010. 
Griggsia gen. nov. is descri 
Stout, A. B.° Intersexes in Plantago lanceolata. Bot. Gaz. 68: 109-133. 
pl. 12, 13. 15 Au Igio. 
Stover, W. G., & Coons, G. R. St. Louis Conference on take-all and 
flag smut of wheat. Phytopathology 9: 330-332. Au 1919. 
Taylor, A. Mosses as formers of tufa and of floating islands. Bryolo- 
gist 22: 38, 39. 8S 1919. 
Téllez, U. Resefia histérica de los estudios botanicos en Colombia. 
Bot. Soc. Cien. Nat. Inst. La Salle 1: 106-109. 15S 1913; 220. I 
Au 1914. 
Thurston, H. W. Jr. Puccinia antirrhini. Phytopathology 9: 330. 
1919. 
Tracy, W. W. Tomato culture. i-x + 1-150. f. 1-43. New York. 
I9IQ. 
The chapter on tomato diseases contributed by W. A. Orton. Not indexed 
separately. 
Transeau, E. N. Science of plant life. i-ix + 1-336. f. I-Tog. 
Yonkers-on-Hudson. 1919. 
Twiss, W. C. A study of plastids and mitochondria in Preissia and 
corn. Am. Jour. Bot. 6: 217-234. pl. 33, 34. Jl 1919. 
Van Fleet, W. Progress in breeding freesias. Jour. Internat. Gard. 
Club 3: 232-239. Je 1919. [Illust.] 
Vestal, A. G. Phytogeography of the eastern mountain-front in 
Colorado—I. Physical geography and distribution of vegetation. 
Bot. Gaz. 68: 153-193. f. 1-17. 16S 1919 

