i MISC. PUBLICATION 797, U. S. DEPT. OF AGRICULTURE 
lands, S. J. van Ooststroom; in Norway, Johannes Lid; in Portu- 
gal, A. R. Pinto da Silva; in Spain, Antonio de Bolos, the late 
Arturo Caballero, and E. F. Galiano; in Sweden, Eric Hultén and 
the late Gustaf Haglund; in Switzerland, Alfred Becherer. 
The principal bibliographical sources utilized in the preparation 
of this work have been The Bradley Bibliography (covering works 
through 1900) ; the Bibliographical Contributions from the Lloyd 
Library; the bibliographies of Saelan for Finland; Krok for Swe- 
den; A. Blytt and others for Norway; Christensen for Denmark; 
Léve’s manuscript bibliography for Iceland; Druce for Great 
Britain; De Wildeman and Durand for Belgium; Béguinot, Sac- 
cardo, and the Bullettino bibliografico della botanica italiana for 
Italy; Eduard Fischer, the Schweizerische Botanische Gesell- 
schaft, and the Schweizerische Landesbibliotek for Switzerland; 
and the following serial publications: Biological Abstracts (v. 1- 
34 (4)), Bohnensieg’s Repertorium annuum literaturae botanicae 
periodicae (v. 1-8), Botanical Abstracts (v. 1-15), Botanisches 
Centralblatt (from v. 174, Zentralblatt; v. 1-179 (n.s., 37), h. 
1-8) and its Beihefte (v. 1-9), Bulletin de la Société Botanique 
de France (v. 1-106(1/2)), Engler’s Botanische Jahrbiicher (v. 
1-78(4)), Fortschritte der Botanik (v. 1-20), International 
Catalogue of Scientific Literature (v. 1-14), Journal of Botany, 
British and Foreign (v. 1—80(956)), and Just’s Botanischer 
Jahresbericht (v. 1-63, which cover literature through 1935). 
The arrangement adopted is an alphabetical-geographical one, 
summarized in the table of contents. Except in a few cases, each 
publication has been listed in full only once, but all necessary 
cross-references have been supplied. Under each geographical 
heading (except Scandinavia, the provinces of France, and a few 
other special cases), works covering the whole region are listed 
first (under the heading General), followed by the local and 
partial titles (under the heading Local); works relating to a 
large part of a country not readily placed under its geographical 
subdivisions have been either combined with the general titles or 
separated (under the heading Partial). Wherever desirable, the 
geographical information given in the title has been supplemented 
in the annotation; in Sweden the name of the lan is given wher- 
ever it does not coincide with that of a landskap, in Denmark 
the name of the amt (county), and in Italy and Spain, where 
the arrangement.is by regions, the name of the province is added 
in each case. Figures of longitude always refer to the Greenwich 
meridian. 
Authors’ given names, when more than one, are cited only as 
initials, but the full names and dates, whenever ascertainable, 
have been given in the index; for this information the writer is 
under great obligations to many of the cooperating botanists listed 
in a paragraph above (especially, for Finland, H. Luther; Swe- 
den, E. Hultén, T. E. Hasselrot; Norway, J. Lid; Denmark, J. B. 
Hansen; Iceland, A. Love; Great Britain, D. H. Kent, N. D. Simp- 
son, G. Taylor; Netherlands, S. J. van Ooststroom; Belgium, W. 
Robyns; Spain, E. F. Galiano; Portugal, A. R. Pinto da Silva; 
Switzerland, A. Becherer; for France and Italy no source of such 
