INDEX TO AMERICAN BOTANICAL LITERATURE 
1918-1919 
e aim of this Index 1s to include al] current botanical literature written by 
Americans, published in ramen or based upon American material ; the word Amer- 
ica Stl used in the broadest sen 
Reviews, and papers that as exclusively to forestry, agriculture, horticulture, 
manatee products of vegetable origin, or laboratory methods are not inclu n 
attempt is made to index the literature of bacteriology. An occasional exception is 
ma ade in favor of some paper appearing in an American periodical which is devoted 
some important particular. If users of the Index will call the attention of the editor 
to errors or omissions, their kindness will be a scienituk 
This Index is reprinted monthly on cards, and furnished i in this form to subscribers 
at the rate of one cent for each card. Selections of cards are not permitted ; each 
subscriber must take all cards published during the term of his subscription, 
spondence — to the card issue should be addressed to the Treasurer of the Hoes 
Botanical Clu 
Arny, A. C., & Hayes, H. K. Experiments in field technic in plot 
tests. Jour. Agr. Research 15: 251-262. 28 O 1918. 
Bailey, I. W., & Thompson, W. P. Additional notes upon the Angio- 
sperms, Tetracentron, Trochodendron and Drimys, in which vessels are 
absent from the wood. Ann. Bot. 32: 503-512. pi. 76 + f. I-5- 
O 1918. 
Black, O. F. Calcium oxalate in the dasheen. Am. Jour. Bot. 5: 447- 
451. 30N 1918. 
Bonns, W. W. Etherization of tissues and its effect on enzyme ac- 
tivity. Ann. Missouri Bot. Gard. 5: 225-299. N 1918. 
Breed, R. S., Conn, H. J., & Baker, J.C. Comments on the evolution 
and classification of bacteria. Jour. Bact. 3: 445-459. S 1918. 
Britton, E. G. Further notes on Jagerinopsis, Broth. Bryologist 21: 
80. 7 D 1918. 
Britton, E. G. Porotrichum not Thamnobryum. Bryologist 21: 83, 
84. 7 D 10918. 
Buchanan, R. E. Studies in the classification and nomenclature of 
the bacteria—VIII. The subgroups and genera of the Actinomy- 
cetales. Jour. Bact. 3: 403- 406. Jl 1918.—I X. The subgroups 
and genera of the Thiobacteriales. Jour. Bact. 3: 461-474. 5S 1918. 
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