50 INDEX TO AMERICAN BOTANICAL LITERATURE 
Smith, E. F. A new disease of wheat. Jour. Agr. Research 10: 51-53 
pl. 4-8. .2 Jl 1917. 
Smith, R. E. A new apparatus for aseptic ultrafiltration. Phyto- 
pathology 7: 290-293. f. 7, 2. 7S 1917 
Spaulding, P., & Gravatt,G.F. Inoculations of Ribes with Cronartium 
ribicola Fischer. Science Il. 46: 243, 244. 7 S 1917. 
Spaulding, P., & Pierce,R. G. State and national quarantines against 
the white pine blister rust. ‘Phytopathology #741G9,'3205 9 BS 1917: 
Spegazzini, C. Espigando en el herbario. Ann. Soc. Cien. Argentina 
82: 217-232. D nate [1917] {Illust.} 
Includes new genera: Chiovendae, Cavaraea and Piroltantha and the new species’ 
Portulaca pha coe 7 eae uypolencs, Cavaraea elegans, Pirottantha modesta, 
Jaborosa leptophylla and J. oxipetala. 
St , E. C., & Piemeisel, F. J. Biologic forms of Puccinia gra- 
minis on cereals and grasses. Jour. Agr. Research 10: 429-496. 
pl. 53-59. 27 Au 1917. 
Standley, P. C. The Chenopodiaceae of the North American Flora. 
Bull. Torrey Club 44: 41 1-429. 155 1917. 
Standley, P. C. New East African plants) Smithsonian Misc. Coll. 
68: 1-20. 23 J 1917. 
Includes numerous new species. 
Stevens, H. E. Report of the plant pathologist. Florida Agr. Exp. 
Sta. Report 1916: 66 R-79 R. f. 10, 11. My 1917 
Contains mention of lightning injury to citrus trees as well as discussion of citrus 
Ss. 
Stevens, O. A. Plants of Manhattan and Blue Rapids, Kansas, with 
dates of flowering—I]. Am. Mid. Nat. 5: 98-112. Jl 1917;— III. 
Am. Mid. Nat. 5: 113-129. S$ 1917. 
Stevenson, J. A. Lightning injury to sugar cane. Phytopathology 7: 
ty, S16. ff. 20° 9S 0987. 
St. John, H. Remarks on several North American species of Alope- 
curus. Rhodora 19: 165-167. 10§ 1917. 
Stout, A. B. Fertility in Cichorium Intybus: the sporadic occurrence 
of self-fertile plants among the progeny of self-sterile plants. Am. 
Jour. Bot. 4: 375-395. f. 12,2. Jl 1917. 
Sudworth,G.B. The pine trees of the Rocky Mountain region. U.S. 
Dept. Agr. Bull. 460: 1-47. pl. 1-28 + maps 1-13. 26 My 1917. 
Swingle, W. T. The botanical name of the lime, tobe aurantifolia. 
Jour. Washington Acad. Sci. 3: 463-465. 4 N 19 
Swingle,W.T. Citrus and Poncirus. In Sargent, ‘“ S., Plantae Wil- 
somianae 2: 141-151. 24 Mr 1914. 
Swingle, W. T. eetvoes, clonetypes, and spermotypes, means for 
botanical type specimens. Jour. Washington Acad. 
Sci. oe Saiesl a Wt , 
