INDEX TO AMERICAN BOTANICAL LITERATURE 7 
Rose, J.N. A new Echeveria from Mexico. Jour. Washington 
Acad. Sei. 1: 267-269. f; 1 4:1) 1911, 
Echeveria lutea Rose. 
Rydberg, P. A. Notes on Rosaceae—XIII. Bull. Torrey Club 
48: 159-172... 1 Au. 1921. 
Safford, W. E. Acacia cornigera and its allies. Jour. Washing- 
ton Acad. Sci. 4: 356-368. 19 Jl 1914 
Includes 10 new species from Mexico and ‘see America. 
Safford, W. E. Chenopodium Nuttalliae, a food plant of the 
Aztecs. Jour. Washington Acad. Sci. 8: 521-527. f. I-3. 
19 S 1918. 
A new species from Mexico. 
Safford, W. E. Identity of cohoba, the narcotic snuff of ancient 
Haiti. Jour. Washington Acad. Sci. 6: 547-562. f. I-3. 
19 S 1916. 
Safford, W. E. New or imperfectly known species of bull-horn 
acacias. Jour. Washington Acad. Sci. 5: 355-360. 19 My 
IQI5. 
Includes 3 new species of Acacia from Mexico. 
Safford, W. E. Notes on the genus Dahlia with descriptions 
of two new species from Guatemala. Jour. Washington 
Acad. Sci. 9: 364-373. f. 1-4. 19 Jl 1919. 
Safford, W. E. VPapualthia mariannae, a new species of 
Annonaceae from the island of Guam. Jour. Washington 
Acad. Sci. 2: 459-463. f. 1, 2. 19 N Ig12. 
Safford, W. E. Proposed classification of the genus Rollinia 
with descriptions of several new species. Jour: Washington 
Acad Sci. 6: 370-384. f. 1-3. 19 Je 1916. 
Includes 3 new species from tropical America. 
Safford, W. E. Rolliniopsis, a new genus of Annonaceae from 
Brazil. Jour. Washington Acad. Sci. 6: 197-204. f. I, 2 
19 Ap 1916. 
Includes 2 new species. 
Safford, W. E. Synopsis of the genus Datura. Jour. Washing- 
ton Acad. Sci. 11: 173-189. f. 7-3. 19 Ap 1921. 
Includes 1 new species from Colombia and 4 from Ecuador. 
Shreve, F. A map of the vegetation of the United States. 
Geog. Rev. 3: 119-125. F 1917 [with map.] 
Solis,O. Importancia de los jardines y algunas especies vegetales 
exoticas. Rev. Agricola 6: 78-84. Je. 1921 [Illust.] 
