INDEX TO AMERICAN BOTANICAL LITERATURE 
1910-1920 
aim of this Index is to include all current botanical literature written by 
Americans, published i in America, or based upon American material ; the word Amer- 
ica being used in the broadest sense. 
eviews, and papers that relate exclusively to forestry, agriculture, horticulture, 
manufactured 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 oe which is devoted 
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 Indexis reprinted monthly on cards, and furnishedin this form to sub- 
scibers at the rate of two cents for each card. Selection of cardsis not permitted; 
each subsciber must take all cards published during the term of his subscription. 
orrespondence relating to the card issue should be addressed to the Treasurer of 
the Torrey Botanical Club. 
Anderson, H. W. Diseases of Illinois fruits. Univ. Illinois Agr. Exp. 
Sta. Circ. 241: 3-155. pl. 1-2 +f. 1-60. Ap 1920. 
Andrews, E. F. Habits and habitats of the North American resurrec- 
tion fern. Torreya 20: 91-96. 1920. 
Polypodium polypodioides. 
Bastin, S.L. Does cold kill plants? Sci. Amer. 123: 427. 23 O 1920- 
Benoist, R. Descriptions d’espéces nouvelles de Phanérogames. Bull. 
Mus. Hist. Nat. Paris 1920. 184-188. 1920. 
Includes Bathysa difformis sp. nov., from French Guiana. 
Berry, E,W. New specific name. Torreya 20: 101. 1920. 
Inga culebrana from the Panama Oligocene. 
Blakeslee, A. F., Belling, J., & Farnham, M.E. Chromosomal duplica- 
tion and Mendelian phenomena in Datura mutants. Science II. 
52: 388-390. 22 O 1920. 
Bédeker, F. Mamillaria hirsuta Bid. spec. nov. Monatschr. Kak- 
teenk. 29: 130-132. N 1919 [Illust.]. 
From Mexico. 
Bonar, L. Wilt of white clover, due to pele alan Trifolii, Phyto- 
pathology 10: 435-441. f. 1-3. 25 O01 
Includes description of Brachysporium Trifolit eiuenbe sp. nov. 
Bradshaw, R. V. Ayrshire rose in Washington. Am. Bot. 26: 98. 
Au 1920. 
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