466 INDEX TO AMERICAN BOTANICAL LITERATURE 
Russell, H. L. New facts in farm science. Wisc. Agr. Exp. 
Sta. Bull. 362: 1-114. f. I~go. Mr 1924. 
Rydberg, P. A. The section Tuberarium of the genus Solanum 
in Mexico and Central America. Bull. Torrey Club 51: 
145-154. “Ap” 17 My; 167-176. “My’”’ 13 Je 1924. 
Including descriptions of 5 new species. 
Sanford, S.N.F. Hibiscus oculiroseus in Rhode Island. Rho- 
dora 26: 88. ‘‘Ap”’ 2 Je 1924. 
Schaffner, J. H. Principles of plant taxonomy. I. Ohio Jour. 
Sci. 24: 146-160. My 1924. 
Schmidt, O. C. Meeresalgen der Sammlung v. Luetzelburg aus 
Brasilien. Hedwigia 65: 85-100. f. r-6. 16 Ap 1924. 
Schneiderhan, F. J.,& Fromme, F.D. Apple scab and its control 
in Virginia. Va. Agr. Exp. Sta. Bull. 236: 1-29. f. 1-6. 
Mr 1924. 
Sedgwick, P. J. Life history of Encephalartos. Bot. Gaz. 77: 
300-310. f. 1-4. pl. 21-22. 19 My 1924. 
Setchell, W. A., & Gardner, N. L. New marine algae from the 
Gulf of California. Proc. Calif. Acad. Sci. IV. 12: 695- 
948. pl. 12-88. 13 My 1924. 
Shreve, F. Growth ia trees and massive organs of plants. The 
growth record in trees. Carnegie Inst. Wash. Publ. 350: 
89-116. f. 20-29. My 1924. 
Shull, C. A., & Shull, S. P. Temperature coefficient of absorp- 
tion in seeds of corn. Bot. Gaz. 77: 262-279. f. r. 19 My 
1924. 
Sideris, C. P. Species of Fusarium isolated from onion roots. 
Phytopathology 14: 211-216. pl. g-11. 24 My 1924. 
Smith, F. F. Self-fertilization in Nicotiana. Science Il. 59: 
461. 23 My 1924. 
Spoehr, H. A., & McGee, J. M. Absorption of carbon dioxide 
the first step in photosynthesis. Science II. 59: 513-514. 
6 Je 1924. 
