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 Amer- 
ica being used in the broadest sense. 
Reviews, and papers that relate exclusively to forestry, agriculture, horticulture, 
manufactured products o: — origin, or laboratory methods are not included, and 
no attempt is made to index the literature of SE a An occasional iga.tine is 
made in favor of some eae appearing in an American periodical which is devoted 
wholly to botany. Reprints are not men aaa unless they differ from the original in 
some important particular. If users of the Index will call the attention of the editor 
to — or omissions, their kindness will be appreciated. 
Index is ee monthly on cards, and furniched in coi form to subscribers 
at ‘i co 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, Corre 
spondence relating to the card issue should be addressed to the Treasurer of the Torrey 
Botanical Club 
Knuth, R. Zwei nieue Dioscorea aus Brasilien. Notizbl. Bot. Gart. 
und Mus. Berlin-Dahlem 7: 538, 539. 1 Mr 1921. 
Korstian, C. F., Hartley, C., Watts, L. F., & Hahn, G. G. A chlorosis 
of conifers corrected by spraying with ferrous sulphate. Jour. 
Agr. Research 21: 153-171... 1-4. 2 My 10921. 
Kranzlin, F. Orchidaceae Dusenianae novae. Arkiv Bot. 168: 1-30 
6 Ap 1920. 
Includes new species from Brazil (23), and Mexico (4), the latter collected by 
Bourgeau. 
Lee, H. A. The increase in resistance to citrus canker with the ad- 
vance in maturity of Citrus trees. Phytopathology 11: 70-73. 
F 1921. 
Lehman, S. G. Soft rot of pepper fruits. Phytopathology 11: 85- 
87. F 1921. 
Lindstrom, E. W. Concerning the inheritance of green and vellane 
pigments in maize seedlings. Genetics 6: 91-110. Ja 1921. 
Livingston, B. E., & Hawkins, L.A. The water-relation between plant 
and soil. Carnegie Instit. Washington Publ. 204: 1-48. Gf I-3. 
10 Mr 10915. ; 
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