INDEX TO AMERICAN BOTANICAL LITERATURE 
1921-1922 
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 foresty, agriculture, horti- 
culture, ase wna products of vegetable aay or pcp methods 
teriology. 
An occasional panne 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 in some important particular. If users 
of the Index will call ee ieareigs of the editor to errors or omissions, their 
ee will be appreciated. 
s Index is ‘caine monthly on cards, and furnished in this form to 
no i 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. 
Fernald, M. L. Lysimachia terrestris (L.) BSP., var. ovata 
(Rand & Redfield) n. comb. Rhodora 24: 76. 20 Je 1922. 
Fernald, M. L. Notes on Sparganium. Rhodora 24: 26-34. 
23 My 1922. 
Fernald, M. L. Variations of Cakile edentula. Rhodora 24: 
21-23. 23 
Folsom, D. Potato leafroll. Maine Agr. Exp. Sta. Bull. 297: 37- 
52. f. 29-35. Ap ig2i. 
Gardner, M. W., & Kendrick, J. B. Overwintering of tomato 
mosaic. Bot. Gaz. 73: 469-485. pl. 77. Je 1922. 
Garner, W. W., & Allard, H. A. Photoperiodism, the response 
of the plant to relative length of day and night. Science 
IT. 55: 582; 583. 2 Je 1922. 
Garratt, G. A. Poisonous woods. Jour. For. 20: 479-487. 
My 1922 
Gray, F. W. Scores of stations for Gaylussacia brachycera in 
West Virginia. Torreya 22: 17, 18. Mr—Ap 1922. 
Grier, N. W. The mosses of Washington County, Pennsyl- 
vania. Bryologist 25: 9-12. 27 Ap 1922. 
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