‘INDEX TO AMERICAN BOTANICAL LITERATURE 
1915-1922 
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 
America being used in the broadest sense 
Reviews, and papers that relate exclusively to forestry, sige horti- 
culture, manufactured products of vegetable origin, ' or la ratory methods 
nd f tnchenthincy. 
An occasional pans 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 insome 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, M. Detection of overgrazing by means of indicator- 
plants. Trans. Utah Acad. Sci. 2: 56-58. 1921. 
Arber, E. A.N. Devonian floras. Pp. 1-xlv + 1-100. f. 1-47. 
Cambridge [England]. 1921. 
A study of the origin of Cormophyta. 
Baez, J. R. Breve noticia sobre la vegetacién de los departa- 
mentos Parana y Diamante (Entre Rios [Argentina]). 
Bol. Minist. Agr. Nac. [Argentina] 27: 465-475. S 1922. 
Belyea, H.C. A suggestion for forest regions and forest types 
as a basis of management in New York State. Jour. For. 
20: 854-868. Dig22. [With map.] 
Bitter, G. Polylepis, Margyricarpus. In Herzog, T., Die von 
Dr. Th. Herzog auf seiner zweiten Reise durch Bolivien in 
den Jahren 1910 und 1911 gesammelten Pflanzen,—VI. 
Meded. Rijk’s Herb. Leiden 46: 2,3. 1922. 
Bower, F. O. The primitive spindle as a fundamental feature 
in the embryology of plants. Proc. Roy. Soc. Edinburgh 43: 
1-36. f. 1-26. 4 N 1922. 
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