INDEX TO AMERICAN BOTANICAL LITERATURE 
1915-1917 
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 rane exclusively to forestry, agriculture, horticulture, 
Bemaees products of vegetable origin, or laboratory methods 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 
*o errors or omissions, their cated 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 permitted ; 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 
1 Club, 
Botanica 
Coulter, J. M. The social, educational, and scientific value of botanic 
gardens. Science II. 45: 643-647. 29 Jl 1917. 
Coyne, F. Cactuslakes. Am. Forest. 23: 361-362. Jl1917. [Illust.] 
Coyne, F. The deadly Manzanillo, Am. Forest. 23: 423. Jl 1917. 
[Illust.] 4 
Daniels, L. L. On the flora of Great Salt Lake. Am. Nat. 51: 499-506. 
Davidson, A. De ee mexicanum sp. nov. Bull. S. Calif. 
Acad. Sci. 16: 50. Jl 1 
Davidson, A. Payne’s new ee lilac. Ceanothus spinosa X C. 
arboreus. Bull. S. Calif. Acad. Sci. 16: 45, 46. pl. 2. J1 1917. 
Davidson, A. Rhamnus catalinae Davidson sp. nov. Bull. S. Calif. 
Acad. Sci. 16: 47. Jl 1917. 
Davis, C. A. Salt marsh formation near Boston and its geological 
significance. Econ, Geol. 8: 623-639. WN 1910. 
Dickerson, M. C. The season of wild flowers. Am. Mus. Jour. 17: 
303-318. pl. 16. My 1917. . 
Douin, C., & Douin, R. Note sur les Sphaerocarpus. Rev. Gén. 
Bot. 29: 129-136. pl. 16. 15 My 1917. 
East, E. M. The explanation of self-sterility. Jour. Heredity 8: 
382-383. Au 1917. 
559 
