PREFACE 



PAET II. 



In the preface to the first part of this catalogue, mention was made 

 of the authorities from which our materials were drawn, and the names 

 of the various botanists from whom or through whom we had obtained 

 a knowledge of the geographical range of the various species. 



One important omission was, however, inadvertently made. Promi- 

 nence should have been given to the fact that through the kindness of 

 Dr. Asa Gray and his able assistant, Sereno Watson, Esq., all doubtful 

 species were critically examined and reported on by them. In every 

 case their decision was considered final, except where mention is made 

 of divergence of opinion and the reasons therefor given in the text. 

 For many years these gentlemen have assisted me in determining our 

 difficult phenogams, and much of the real value of the present work is 

 due to them. 



During the past year additional data have been obtained from most 

 of the Provinces, chiefly from the following sources: Extensive collec- 

 tions were made by myself in Nova Scotia, Cape Breton and Anticosti. 

 In New Brunswick several enthusiastic botanists have greatly extended 

 the knowledge of the flora and added many species to the provincial 

 list. Mr. Henry Ami, of the G-eological and Natural History Survey, 

 has added a number of interesting species to the Ontario flora, and 

 Adis Fowler, C.E., of Toronto, has contributed a local list of the species 

 found near that city. David F. Day, President of the Buffalo Natural 

 History Society, has transmitted a complete list of the species collected 

 by himself and others on the Canadian side of the Niagara River and 

 on the shore of Lake Erie. The Canadian Pacific Railway Company 

 had extensive collections made last summer in the prairie region by 

 Messrs. Mason, Ducker, Creelman and J. M. Macoun. Dr. G. M. 

 Dawson, assisted by J. B. Tyrrell, B.A., in connection with his explora- 



