INDEX TO AMERICAN BOTANICAL LITERATURE 
1920-1922 
The aim of this Index is to include all current botanical literature written by 
Americans, published in America, or — upon American material; the word 
America being used in the broadest s 
Reviews, and papers that relate ec idieiy to foresty, agriculture, horti- 
culture, manufactured products of vegetable origin, . or ranean — 
riology. 
An occasional peaks is made i in favor of some paper appearing in an hee 
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. 
-Hollick, A. Paulownia in winter. Jour. New York Bot. Gard. 
23: 1-3. pl. 267, 268. Ja 1922. 
Holm, T. Contributions to the morphology, synonymy, and 
geographical distribution of arctic plants. Rep. Canad. 
Arctic Exped. 1913-18. 5°: 1-139. 10 F 1922 [Illust.]. 
Holm, T. Seasonal dimorphism in Arisaema triphyllum. Am. 
Midl. Nat. 8: 42-48. f. 1-5. Mr 1922. 
Holm. T. Studies in the Cyperaceae XXXIII. Am. Jour. Sci. 
3: 138-144. f. r-I2. F 1922. 
House, H. D. Nomenclatorial notes on certain American plants 
—II. Am. Midl. Nat. 8: 61-64. Mr 1922. 
Howe, M. A. The Collins er eptioN of Algae. Jour. New York 
Bot. Gard. 23: 23-24. F 1 
Hughes, D. K. The “‘serrato-ciliata” group of Tropaeolum. 
Kew Bull. Misc. Inform. 1922: 63-85. f. 7-4. 1922. 
Includes 16 spp. nov. 
Hunter, M. R. The present status of Scolopendrium in New 
York State. Am. Jour. Bot. 9: 28-36. f. 7,2. 21 F 1922. 
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