vi INTRODUCTION 



but where the percentage of such articles in any serial was apparently small or the articles of slight 

 importance, time has not been given to finding articles in it not known previously through ex- 

 cerpts, republications or references in other publications. 



In order to reduce as much as possible the size of the Bibliography it has been found necessary to 

 restrict the insertion of the same title under different subject divisions, and the use of cross refer- 

 ences. It might, for example, have been advisable to give a cross reference where a taxonomic unit 

 has been treated from a view-point other than taxonomic. In such cases, however, the taxonomic 

 subject has been given precedence. For example, the title of an article on the morphology of the 

 flowers of Cycas revoluta can be found only under Cycas revoluta and not under Morphology of 

 Flower; and the title of an article on North American Conifers appears only under Coniferae 

 (North American) and not under North America in the general phytogeographical arrangement. 



The greater part of the works enumerated in this Bibliography have been seen by the compiler, 

 who has examined the libraries of the following institutions: 



Boston and Cambkidge. Arnold Arboretum; Gray Herbarium; Harvard College; Museum 

 of Comparative Zoology; Boston Society of Natural History; American Academy of Arts and Sci- 

 ences; Boston Athenseum; Boston Public Library. 



Washington. The Congressional Library; Department of Agriculture. 



Cincinnati. The Lloyd Botanical Library. 



London. The Royal Botanic Gardens, Kew; British Museum; Natural History Museum, South 

 Kensington; Royal Society; Linnaean Society; the Royal Horticultural Society. 



Paeis. Museum d'Histoire Naturelle; Bibliotheque Nationale; Societe" Nationale d'Horticulture; 

 Soci^te" Nationale d'Agriculture. 



Berlin. Kgl. Botanisches Museum; Kgl. Bibliothek; Gartenbaugesellschaft. 



Dresden. Kgl. Offenthche Bibliothek. 



Gottingen. Universitats-Bibliothek. 



Tubingen. Universitats-Bibliothek. 



Vienna. K. K. Naturhistorisches Hof museum; K. K. Famihen-Fideikommiss-Bibliothek. 



Geneva. Herbier Boissier; Herbier De Candolle; Conservatoire et Jardin botaniques. 



St. Petersburg. Imperial Botanic Garden; Academie Imperiale des Sciences; Imperial Public 

 Library; Imperial University. 



Leyden. Rijks Herbarium. 



Madrid. Biblioteca Nacional; Jardin Botanico. 



Coimbra. Jardim Botanico. 



Florence. Museo Botanico. 



The compiler has also examined the libraries of these Forest Institutes: Forst-Akademie at 

 Tharand, at Eberswalde, and at Hann.-Miinden; Forstliche Versuchsanstalt, Miinchen; Ecole 

 Nationale des Eaux et Forets, Nancy; Istituto Forestale, Vallombrosa; and Imperial Forestry In- 

 stitute, St. Petersburg. 



Entries in the following languages have been obtained by these assistants: 



Bohemian. Dr. K. Domin, Prag. 



Polish. Dr. K. Rouppert and Dr. B. Namyslowski, Cracow. 



Hungarian. The botanical literature by Dr. Geza Lengyel, Budapest; the forestry literature 

 by Karl Bund, Budapest. 



Servo-Croatian. Dr. N. Kosanin. 



Russian. E. Wolf, St. Petersburg. 



Roumanian. Prof. N. Jacobescu, Bucarest. 



Greek. Dr. G. Lakon, Athens. 



Dutch. Dr. W. J. Jongmans, Leyden. 



Danish. Paul Bartold, Emil Bendixsen, and Carl Christensen, Copenhagen. 



Norwegian. Bernt Lynge, Christiania. 



Swedish. Dr. Tycho Vestergren, Stockholm. 



Japanese. Shintaro Arimoto, formerly at Boston. 



