220 INDEX TO AMERICAN BOTANICAL LITERATURE 
Roberts, J. W. Plum blotch, a disease of the Japanese plum, 
caused by Phyllosticta congesta Heald and Wolf. Jour. 
Agr. Research 22: 365-370. pl. 34 + f. 1, 2. 12 N I921.- 
Robinson, T. R. The bud-sport origin of a pink-fleshed grape- 
fruit in Florida. Jour. Hered. 12: 195-198. 23 S 1921. 
[Illust.] 
Rogers, E. C. Influence of the period of transplanting western 
white pine seedlings upon their behavior in nursery and 
plantation. Jour. Agr. Research 22: 33-46. f. 1-7. 1 O 1921. 
Round, E. M. Odontopteris genuina in Rhode Island. Bot. 
Gaz. 32: 397-403. f. I-53. 15 D 1921. 
Rumbold, C., & Tisdale, E. K. Notes on Phoma insidiosa Tass. 
found on Sudan grass. Phytopathology 11: 345 9 D 1921. 
Ruschmann, W. Die Cohune- oder Corozoniisse Mittelame- 
rikas. Tropenpflanzer 24: 147, 148. O 1921. 
Satterthwait, A. F. Notes on the food plants and distribution 
of certain billbugs. Ecology 2: 198-210. f. 7. 3 D 1921. 
Schlechter, R. Die Thismieae. Notizbl. Bot. Gart. u. Mus. 
Berlin-Dahlem 8: 31-45. 1S 1921. 
ncludes Triurocoden, gen. nov., from Brazil, and new American species 
in Sines (1), Myostoma (1). 
Schiiepp, O. Zur Theorie der Blattstellung. Ber. Deutsch. 
Bot, Ges. 39: 249-257. f. FT, 2. .10 S 1921. 
Schultz, E. S.A transmissable mosaic disease of Chinese cab- 
bage, mustard, and turnip. Jour. Agr. Research 22: 173- 
178. pl. B. 15 O 1921. 
Seymour, E. K., & McFarland, F. T. Loss from rye ergot. 
Phytopathology 11: 285-289. f. 1.2. 15 N 1921. 
Shapovalov, M., & Edson, H. A. Blackleg potato tuber-rot under 
irrigation. Jour. Agr. Research 22: 81-82. pl. 13-16 + 
pl. A. 8 O 1921. 
Showalter, A. M. Chromosomes of Conocephalum conicum. 
Bot. Gaz. 72: 245-249. pl. 4, 5. 15 O 1921 
Sievers, A. F., & McIntrye, J.D. Changes in the composition 
of paprikas (Capsicum annuum) during the growing period. 
Jour. Am. Chem. Soc. 43: 2101-2104. S 1921. 
