I22 INDEX TO AMERICAN BOTANICAL LITERATURE 
Rose, J. N. Lenophyllum texanum. Addisonia 8: 21. pl. 267. 
22 Au 1923. 
Rose, J. N. Schizocentron elegans. Addisonia 8: 19. pl. 266. 
22 Au 1923. ; 
Rose, J. N. Sedum diffusum. Addisonia 8: 27. pl. 270. 22 
Au 1923. 
Rosen, H. R., & Elliott, J. A. Pathogenicity of Ophiobolus 
caricett in its relationship to weakened plants. Jour. 
Agr. Research 25: 351-358. pl. 1-5. 25 Au 1923. 
Rydberg, P. A. A new genus of Senecioid composites. Jour. 
Washington Acad. Sci. 13: 287-289. Ig Jl 1923. 
Pseudoclappia, gen. nov., from New Mexico. 
Rydberg, P. A. Notes on Fabaceae—II. Bull. Torrey Club 
50: 261-272. 17 Au 1923. 
Includes Homalobus MacGregorii, sp. nov., from California. 
_ Rydberg, P. A. Galegeae (pars). N. Am. Fl. 24: 155-200. 
16 Jl 1923. 
Includes new species in Cracca (13) and Brongniartia (8). 
Rydberg, P. A. Indigofereae. N. Am. Fl. 24: 137-154. 16 
1 1923. 
Includes eleven new species in Indigofera. 
St. John, H. William Conklin Cusick. Rhodora 25: 101-105. 
7 Jl 1923. [With portrait.] 
Salaman, R. N. & Lesley, J. W. Genetic studies in potatoes; 
the inheritance of immunity to wart disease. Jour. 
Genet. 13: 177-186. 31 Au 1923. 
Sands, H. C. The structure of the chromosomes in T7rades- 
cantia virginica L. Am. Jour. Bot. 10: 343-360. pl. 29, 
+ J. I-g.. 28 Hi 163: 
sere E. R. A reversionary character in the stock (Mat- 
thiola incana) and its significance in regard to the structure 
and evolution of the gynoecium in the Rhoeadales, the 
Orchidaceae, and other families. Ann. Bot. 37: 451- 
482. f. 1-53. Ji 1923. 
