INDEX TO AMERICAN BOTANICAL LITERATURE 
1917-1921 
The aim of this Index is to include all current botanical literature written by 
Americans, published in America, or based upon American material ; the word Amer- 
ica being used in the broadest s 
Reviews, and papers that pase exclusively to forestry, agriculture, a oe 
soaiapucense products of vegetable origin, or laboratory methods are not i ed, an 
no attempt is made to index the literature of bacteriology. An sia: insti is 
made in favor of some paper appearing in an American 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. 
s Index is reprinted monthly on cards, and furnished in this form to sub- 
am at the rate of three cents for each card. Selection of cards is 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. 
Adams, J. F. Gametophytic development of blister rusts. Bot. 
Gaz. 71: 131-137. f. 1-4. .15 F 1921. 
Adams, J. F. Observations on the infection of Crataegus by Gym- 
nosporangium. Mycologia 13: 45-49. f. I-4. 3 F 1921. 
Allen, M. E. The supposed generic character of Naumburgia. Rho- 
dora 22: 193, 194. 15 F 1921. [Illust.] 
Arthur, J. C. Aecidiaceae (cont.). N.Am. Fl.'7: 405-480. 8 F 1gat. 
Includes collaboration by H. S. Jackson on Dicaeoma on Carduaceae and by 
s. 
Arthur, J. C. Nineteen years of culture work. Mycologia 13: 12-23. 
3 F 1921. 
Artschwager, E. F. Pathological anatomy of potato blackleg. Jour. 
Agr. Research 20: 325-330. pl. 57,58 +f. 2. 15 N 1920. 
Babcock, E. B., & Collins, J. L. Interspecific hybrids in Crepis. I. 
Crepis capillaris (L.) Wallr. x C. tectorum L. Proc. Nat. Acad. 
Sci. 6: 670-673. 15 N 1920. 
Bailey, I. W. The cambium and its derivative tissues. III. A recon- 
naissance of cytological phenomena in the cambium. Am. Jour. 
Bot. 7: 417-434. pl. 26-29. 12 Ja 1921. 
J. H. Aetopteron as a generic name. Am. Fern Jour. ro: 
7 F £y%, 482. 7 F 1920: 
207 
