proceedings: the botanical society 507 



The 90th regular meeting of the Botanical Society of Washington 

 was held on October 6, 1913, at the Cosmos Club with forty-two mem- 

 bers and seventeen guests present, including the following distinguished 

 European botanists: Frau Dr. Brockmann-Jerosch, Zurich; Dr. 

 Edward Rxjeel, Zurich; Prof. Carl Schroter, Zurich; Prof. C. von 

 TuBEUF, Munich. 



The program consisted of brief informal remarks, as follows: 



President Stockberger: An address of welcome to the guests of the 

 Society. 



Mr. Walter T. Swingle: Citrus plants of the world and their im- 

 portance and use in connection with citrus culture and citrus breeding. 



Prof. C. VON Tubeuf: A brief summary of the results of twenty years' 

 work with the mistletoe. (Translated by Prof. Schroter). 



Mr. David Fairchild : Plant introduction work of the Bureau of 

 Plant Industry. 



Prof. Carl Schroter: Impressions received during the American 

 International Phyteographic excursion. 



Mr. Carl Kellerman : Nodule production and nitrogen fixation by 

 plants other than leguniinosae. 



Mr. Haven Metcalf : The chestnut blight disease. ■ 



Mr. W. E. Safford: Photographs of bullthorn acacias. 



The 91st regular meeting of the Botanical Society of Washington 

 was held on November 4, 1913, at the Cosmos Club with forty-six 

 members and five guests present. 



Dr. Harry B. Humphrey and Messrs G. C. Husmann and K. J. J. 

 Lotsy were elected to membership. 



, The action of the retiring Executive Committee relative to the giving 

 of a dinner in honor of the seventieth birthday of Dr. Edward L. 

 Greene was called to the attention of the Society by the President and 

 a committee was appointed to arrange the details. 



The following scientific program was presented: 



Abbreviations used in the citation of botanical literature. Prof. A. S. 

 Hitchcock. The speaker pointed out the different methods used for 

 abbreviating citations, the extreme contraction on the one hand, such 

 as "O B Z" (Oesterreichische Botanische Zeitschrift) , and on the other 

 the elaborated citations used by some authors in the Pflanzenreich. 

 Abbreviations should be brief as possible consistent with clearness, but 

 should follow a definite system. The speaker described the system fol- 

 lowed in abbreviating citations used in the Contributions from the Na- 

 tional Herbarium. The record of authorized abbreviations of authors 

 and titles is indexed in a card catalog. Authors consult this record 

 when preparing manuscript for publication, thus aiding the editor to 

 secure uniformity. 



Non-parasitic foliage injury. Mr. Carl P. Hartley. Notes were 

 given on the effects of drouth and storm on leaves of ornamental trees 

 at Washington, D. C, for the past season. June and July were hot 

 and dry, -ndth but 35 per cent of normal rainfall. Norway maple, es- 



