PREFACE. V 



recently issued ' List of Pteridophyta and Spermatophyta growing with- 

 out cultivation in Northeastern North America,' that is, if such names 

 do not coincide with those in the text. 



A second fascicle of the Flora will be issued at an early date, includ- 

 ing the remaining polypetalous orders to the Zeguminosce. To complete 

 Dr. Gray's manuscript of this second portion of the work the following 

 specialists have most kindly consented to co-operate with the editor : 

 President J. M. Coulter {Hypericacece)^ Professor Wm. Trelease (Linacece, 

 Uicinece, Geraniacece^ Ehamnacecv, and Celastracece), and Professor L. 

 H. Bailey {Vitacece). For temporary convenience a generic index is 

 appended to the present issue, but the second fascicle will contain a full 

 specific and synonymic index, as well as title page for both parts, which 

 may be conveniently bound together. 



It is a pleasure to acknowledge the cordial support and friendly 

 assistance of the botanists throughout the country, who, by contributing 

 valuable specimens and notes, have added greatly to the fulness and 

 accuracy of the present work. The names of such contributoi-s are 

 frequently mentioned in the text, and to all heartfelt thanks are here- 

 with tendered. For permission to make free use of the rich collections 

 and libraries of Columbia College, the Pliiladelphia Academy of Natui*al 

 Sciences, the Department of Agriculture, and the National Museum, the 

 editor is especially indebted to Professor N. L. Britton of New York 

 City, the late John II. Redfield, Esq., Messrs. Thomas Meehan and 

 Stewardson Brown, of Philadelphia, and Mr. F. V. Coville, of Washing- 

 ton, respectively. Specimens of various difficult groups have also been 

 lent by Professor John Macoun, Government Naturalist of Canada, and 

 Mr. J. M. Macoun, Curator of the Government Herbarium at Ottawa, 

 by Professor L. H. Pammel, of the Agricultural College, Ames, Iowa, 

 Professor W. W. Bailey and Mr. J. F. Collins, of Brown Univei-sity, 

 as well as from the extensive private collections of Messrs. J. Donnell 

 Smith, W. M. Canby, Mr. and Mrs. T. S. Brandegee, Messrs. Walter 

 Deane, E. L. Rand, and Theodor Holm, to all of whom grateful acknoM 1- 

 edgment is made. The labor of preparing for press the manuscript of 

 the present issue has been greatly lightened by the very efficient, and 

 painstaking clerical and bibliographical work of Miss Mary A. Day, 



