INDEX TO AMERICAN BOTANICAL LITERATURE 
1913-1918 
The aim of this Index ts to include all current botanical literature written by 
Americans, published in America, or based upon American material ; the word Amer- 
ica be at used in the broadest s 
ws, and papers that he exclusively to forestry, egriculture, horticulture, 
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 
to errors or omissions, their sats will be appreciated. 
This Index is reprinted monthly on cards, and furnished in this form to subscribers 
at the rate of one cent for each card, Selections of cards are not permitied ; each 
subscriber must take all cards published during the term of his subscription, Corre- 
spondence relating to the card issue should be addressed to the Treasurer of the Torrey 
Botanical Club, 
Adams, J. F. Keithia on Chamaecyparis thyoides. Torreya 18: 157- 
160, f. I-28. 9S 1618: 
Keithia Chamaecy parissi sp. nov. is described. 
Anderson, P. J. Rose canker and its control. Massachusetts Agr. 
Exp. Sta. Bull. 183: 11-46. pl. 1-3+f. 1-11. My 1918. 
Andrews, A. L. A collection of mosses from North Carolina. Bry 
ologist 21: 61-67. Jl 1918. 
Arny, A. C., & Garber, R. J. Variation and correlation in wheat, with 
special reference to weight of seed planted. Jour. Agr. Research 
14: 359-392. f. 1-8. 26 Au 1918. 
Artschwager, E. F. Anatomy of the potato plant, with special refer- 
ence to the ontogeny of the vascular system. Jour. Agr. Research 
14: 221-252. pl. 27-47. 5 Au 1918. 
Atkinson, G. F. Preliminary notes on some new species of agarics. 
Proc. Am. Philos. Soc. 52: 354-356. 8 Au 1918 
ew species are described in Amanita (2), Hypholoma (2), Lactarius (2), Lepiota 
(1) and Pholiota (1). 
Bakke, A. L. Determination of eines Bot. Gaz. 66: 81-116. f. 1-5. 
15 Au 1918. 
503 
