INDEX TO AMERICAN BOTANICAL LITERATURE 
1910-1921 
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- 
ee con pepe of oe origin, or laboratory methods 
i nd is mad index the literature of bacteriology. 
An occasional sasied is anide t 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 the attention of the editor to errors or omissions, their 
kindness will be appreciated 
This Index is reprinted 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 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. 
Adams, J. F. Rustson conifers in Pennsylvania. Pennsylvania 
Agr. Exp. Sta. Bul. 160: 3-30. f. 1-10. D 1919 
Adams, J. F. Sexual fusions and development of the sexual 
organs in the peridermiums. Pennsylvania Agr. Exp. Sta. 
Bull. 160: 31-76. pl. 1-5 + f. 1-8. D 1919. 
Albertson, A. O. Nantucket wild flowers. Pp. i-xlv + 1-442. 
i921. [Illust.] 
Arny, A. C. Further experiments in field technic in plot tests. 
Jour. Agr. Research 21: 483-500. pl. 94. 1 Jl 1921. 
Ashe, W. W. A new shrubby ged Jour. Washington 
Acad. Sci. 3: 434° 468.2 
Aesculus microcarpa, sp. nov., a. poe 
Barnes, C. R. Physiology, in Coulter, J. M., Barnes, C. R., & 
Cowles, H. C., A textbook of botany 295-484. f. 619-600: 
1910. 
Barnhart, J. H. Otto Kuntze. Bull. Charleston Mus. 9: 65- 
68: DD: 1913. 
Berry, E,W. An Eocene flora from Trans-Pecos, Texas. U.S. 
Geol. Surv. Professional Paper 125-A: 1-9. pl. 1-3+f. 
2 S 1919 
Includes new species in Geonomites (1) and Ilex (1). 
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