INDEX TO AMERICAN BOTANICAL LITERATURE 
1923 
The aim of this Index is to include all current botanical literature written by 
Americans, published in America, or cnr upon American material; the word 
America being used in the broadest 
views, and papers that relate es to forestry, agriculture. horti- 
Sieice manufactured products: of vegetable sk ae or mihorstory methods 
are not included, and f ssereise 
An occasional exception is made i in favor of some paper appearing in an Amer 
hes they differ from the original in some important particular. If users 
‘iio will be appreciated. 
This Index is pins 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 ey Son 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. 
Addams, R. M. The effect of the hydrogen ion on the proto- 
plasm of the root hairs of wheat. Am. Jour. Bot. 10: 
241-220. $f. 23, 18 Ap 19024; 
Allen, W.E. Studies of catches of marine phytoplankton made 
by aid of the Kofoid bucket in 1921. Ecology 4: 74-80. 
21 F 1923. 
Arrhenius, O. Statistical investigations in the constitution of 
plant associations. Ecology 4: 68-73. 21 F 1923. 
Artschwager, E. F. Anatomical studies on potato-wart. Jbur. 
Agr. Research 23: 963-968. pl. 1-5. 24 Mr 1923. 
Artschwager, E. F. Occurrence and significance of phloem 
necrosis in the Irish potato. Jour. Agr. Research 24: 
237-246. pl. 1-5. 21 Ap 1923. 
Bailey, I. W. Notes on Neotropical ant-plants. II. Tachigaha 
paniculata Aubl. Bot. Gaz. 75: 27-41. pl. 1, 2 + f. I-3. 
23 
Bailey, J. W. The passing of our forest mosses. Bryologist 
26: 20-22. pl. 3. 16 Ap 1923. 
401 
