80 INDEX TO AMERICAN BOTANICAL LITERATURE 
Small,J.K. Eugenia buxifolia. Addisonia 8:1, 2. pl.257. 15 
My 1923. 
Native of Chile. 
Small, J. K. The needle palm—Rhaphidophyllum hystrix. 
Jour. New York Bot. Gard. 24: 105-114. Je 1923. 
[Illust.] 
Spencer, E.R. To demonstrate protein grains. Science II 57: 
693. Je 1923. 
Stakman, E.C. The species concept from the point of view of 
a plant pathologist. Am. Jour. Bot. 10: 239-244. 10 My 
1923. 
Stakman, E. C., Levine, M.N., & Bailey, D. L. Biologic forms 
of Puccinia graminis on varieties of Avena spp. Jour. 
Agr. Research 24: 1013-1018. pl. 1-4. 23 Je 1923. 
Stakman, E. C. et al. Spores in the upper air. Jour. Agr. 
Research 24: 599-606. pl. 1, 2. 19 My 1923. 
Stapf, O. Xerophyllum tenax. Bot. Mag. 148: pl. 8964. 3 
My 1923. 
Stevens, F. L., & Dowell, R. I. A Meliola disease of cacao. 
Phytopathology 13: 247-250. f. 1-3. 11 My 1923. 
Includes new species in Meliola (1) and Helminthosporium (1). 
Sudworth, G.B. The age of Monterey cypress. Am. For. 29: 
270, 271. My 1923. [Illust.] 
Suksdorf, W. Eine neue Weide aus dem Staate Washington. 
Osterr. Bot. Zeitschr. 72:94, 95. My 1923. 
Salix Disckiana, sp. nov. 
Tanner, F. W., & Rider, E. Action of ultraviolet light on 
yeast-like Fungi. Bot. Gaz. 75: 309-317. 19 My 1923. 
Thayer, P. Raspberry breeding notes. Jour. Hered. 14: 
12, 13. f. §, 0. 18 My r6a3. 
Thurston, H.W. Intermingling gametophytic and saprophytic 
mycelium in Gymnosporangium bermudianum. Bot. Gaz. 
75: 225-248. pl. 12,13 +f. 4. 19 My 1923. 
