FLORAS OF THE WORLD—PART II 3 
general works on ecology, phytogeography, and related subjects ; 
and by indicating the libraries in which all works not available in 
Washington were examined or the name of the correspondent who 
supplied information about them. Parenthetically, it may be 
stated that only about 64 of the works given in part I were not 
then available in Washington, and that some of them have since 
been added to libraries here. 
Like part I, this list is fundamentally based on the subject card 
catalog of botany in the library of the United States Department 
of Agriculture, begun in 1906 under the direction of the late Dr. 
Frederick V. Coville by Majorie F. Warner and Alice C. Atwood, 
and continued by them and their assistants and successors until 
July 1952.4 However, the smaller and the more local publications 
on European botany are so much less completely represented in 
the catalog, and so many of them are not available in this country, 
that much more extensive research has been necessary both in 
literature and in American and foreign libraries to attain the 
essential completeness of the first part. As before, not only the 
Washington libraries (Department of Agriculture, Library of 
Congress, Smithsonian Institution, National Library of Medicine 
(formerly Surgeon-General’s Library), and Geological Survey), 
but those of the Gray Herbarium and the Arnold Arboretum (now 
in process of combination into one) and the New York Botanical 
Garden have been examined. In addition, in the summer of 1950, 
the author examined the libraries at the Muséum National 
d’Histoire Naturelle in Paris; the Botaniska Avdelningen of the 
Naturhistoriska Riksmuseum in Stockholm; the Universitetets 
Botaniske Museum, Copenhagen; the Botanisch Museum en 
Herbarium, Utrecht; the Rijksherbarium and the collection of the 
Koninklijke Nederlandse Botanische Vereniging, Leiden; the 
British Museum (Natural History), South Kensington; the Royal 
Botanic Gardens, Kew; and the private libraries of N. Douglas 
Simpson and George Taylor, in England. The authorities of the 
Lloyd Library, Cincinnati, have lent many volumes and afforded 
help in other ways, and Rogers McVaugh of the University of 
Michigan has looked up many French publications in the Uni- 
versity library. 
In nearly every country the author has benefited by the 
assistance of one or more botanists, without whose help the work 
would be much less complete. The following merit particular 
mention in this connection: In Belgium, Walter Robyns; in Den- 
mark, J. B. Hansen; in Finland, Hans Luther; in France, Georges 
Dillemann of Paris, Bernard de Retz of Versailles, and Paul 
Jovet of the Muséum National; in Great Britain, D. H. Kent of 
London, H. 8. Marshall, E. J. Salisbury and George Taylor of Kew, 
and N. Douglas Simpson of Bournemouth; in Iceland, Askell Léve, 
now of Montreal, Canada; in Italy, Luigi Fenaroli, Valerio Gia- 
comini, Rodolfo Pichi-Sermolli, and the late Francesco Sappa; in 
Luxembourg, F. L. Lefort, now of Montreal, Canada; in Nether- 
* Current publications are listed in the monthly Bibliography of Agriculture, published by the 
Department of Agriculture library and now (1959) in its 23d volume, but no additions are 
made to the botany card catalog. The botany subject catalog is now published in book form. 
