INDEX TO AMERICAN BOTANICAL LITERATURE 
1920-1922 
The aim of this Index is to include all current botanical literature written by 
Americans, published in America, or any upon American material; the word 
America being used in the broadest s 
Reviews, and papers that relate Chaioae to foresty, agriculture, horti- 
canoes spss aS apt ig of vegetable ee or - oratory methods 
nd f bacteriology. 
An occasional siete is made i in favor of some paper appearing in an Ameri- 
can periodical which is devoted wholly to botany. Reprints are not mentioned 
unless they differ from the original in some important particular. If users 
of the Index will call the attention of the editor to errors or omissions, their 
kindness will be appreciated. 
This Index is reprinted monthly on cards, and furnished in this form to 
subscribers at the rate of three cents for each card. Selections of cards are 
not permitted; each subscriber must take all cards published during the term 
of his subscription. Correspondence relating to the card issue should be 
addressed to the Treasurer of the Torrey Botanical Club. 
Anderson, R. J., & Kulp, W. L. Analysis and composition of 
corn pollen. Jour. Biol. Chem. 50: 433-453. F 1922. 
Anderson, P. J. Development and pathogensis of the onion 
smut fungus. Massachusetts Agr. Exp. Sta. 4: 99-133. f. 
i~3.° N 1921. 
Andrews, A. L. Further bryophytes from North Carolina (and 
Tennessee). Bryologist 24: 49-58. 9 Ja 1921. 
Andrews, A. L. Notes on North American Sphagnum, IX. 
Bryologist 24: 81-86. 27 F 1922. 
Armstrong, G. M. Studies in the physiology of the fungi. 
XIV. Sulphur nutrition: the use of thiosulphate as in- 
fluenced by hydrogen-ion concentration. Ann. Missouri 
Bot.: Gard. 8: 237-281. f. 1-27. 3 1921. 
Arndt, C. H. The growth of field corn as affected by iron and 
- aluminum salts. Am. Jour. Bot 9: 47-71. pl. 4 + f. 1-6. 
20 Mr. 1922. 
Arthur, J.C. Uredinales collected by Fred J. Seaver in Trinidad. 
- Mycologia 14: 12-24. 6 Mr 1922. 
Includes 5 new species. 
