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508 INDEX TO AMERICAN BOTANICAL LITERATURE 
Nichols, G. E. War work for bryologists. Bryologist 21: 53-56. 
Jl 1918. 
Nothnagel, M. Fecundation and formation of the primary endosperm 
nucleus in certain Liliaceae. Bot. Gaz. 66: 143-161. pl. 3-5. 15 
Au 1918. 
O’Gara, P. J. The white-spot disease of alfalfa. Science II. 48: 299- 
301. 20S 1918. 
Paulsen, O. A new Cereus from the West Indies. Jour. Bot. 56: 235. 
Au 1918. 
Cereus venditus. 
Peltier, G. L. Susceptibility and resistance to citrus-canker of the 
wild relatives, citrus fruits, and hybrids of the genus Citrus. Jour. 
Agr. Research 14: 337-358. pl. 50-53. 26 Au 1918. 
Peltier, G. L., & Neal, D. C. A convenient heating and sterilizing 
outfit for a field laboratory. Phytopathology 8: 436-438. f. 1, 2. 
Au 1918. 
Pennell, F. W. A plea for Aureolaria. Rhodora 20: 133-137. 1 Au 
1918. 
Potter, R. S., & Snyder, R. S. The production of carbon dioxide by 
molds inoculated into sterile soil. Soil Sci. 5: 359-375. pl. r+f. 1-4. 
My 10918. 
Reichert, E.T. The differentiation and specificity of starches in rela- 
tion to genera, species, etc. Part I. i-xvii+1-342+ [1-21]. pl. 1- 
roz. Washington. 1913; Part II. i-xvii+343-900+[1-18]. Wash- 
ington. 1913. 
Carnegie Publ. No. 173. 
Riddle, L. W. Some extensions of ranges. Bryologist 21: 50. 30 Jl 
1918. 
Roberts, J. W. The source of apple bitter-rot infections. U.S. Dept. 
Agr. Bull. 684: 1-25. pl. 1-5. 19 Au 1918. 
Robertson, C. Pollination of Asclepias cryptoceras. Bot. Gaz. 66: 
177. 15 Au 1918. 
Sargent, C. S. Notes on North American trees.—II. Carya. Bot. 
Gaz. 66: 229-258. 16S 1918. 
Includes Carya leiodermis sp. nov. and Many new varieties and combinations. 
Schneider, C. Notes on American willows—I. The species related to 
Salix arctica Pall. Bot. Gaz. 66: 117-142. 15 Au 1918. 
Schwarze, C. A. The parasitic fungi of New Jersey. New Jersey 
Agr. Exp. Sta. Bull. 313: 1-226. f. 1-1056. S$ 1917. 
