INDEX TO AMERICAN BOTANICAL LITERATURE 
1908-1921 
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 sense. 
Reviews, and papers that relate exclusively to forestry, agriculture, horticulture, 
mance ae products of vegetable origin, or labora atory me are not included, and 
no attempt is made to index the literature of bacteriology. An occasional exception 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 
rs or omissions, their kindness will be appreciated. 
This Index is reprinted monthly on cards, and furnished in this form to sub- 
scribers at the rate of three cents for each card. Selection of cards is not permitted: 
each subscriber must take all cards published during oy term of his subscription. 
Correspondence relating to the card issue should be addressed to the Treasurer of 
the Torrey Botanical Club. 
Andres, H. Piroleen-Studien. Verh. Bot. Ver. Brandenburg 56: 1-70. 
6 Je 1914. 
Arber, A. Leaves of the Helobieae. Bot. Gaz. 72: 31-38. pl. I- 
16 Jl 1921. : 
Arthur, J.C. Specialization and fundamentals in botany. Am. Jour. 
Bot. 8: 275-285. 30 Je 1921. 
Bakhuizen Van den Brink, R.C. Revisio generis Avicenniae. Bull. 
Jard. Bot. Buitenzorg III. 3: 199-226. pl. r4-22. My 1921. 
Barnhart, J. H. Biographical notices of persons mentioned in the 
Schweinitz-Torrey correspondence. Mem. Torrey Club 16: 290- 
300. 16 Jl 1921. 
Blake, S. F. A new Aspilia from Trinidad. Proc. Biol. Soc. Washing- 
ton 34: 119, 120. 30 Je 1921. 
Blake, S. F. New Meliaceae from Mexico. Proc. Biol. Soc. Washing- 
ton 34: 115-118. 30 Je 1921 
New species in Cedrela (1) and Guarea (2). 
Bradshaw, R. V. Oregon willows. Am. Bot. 27: 56-59. My 1921. 
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