In thi« publication it is intended to enumerate systematically the 

 plants of the Dominion of Canada, and to define their range in so 

 far as the knowledge at present available enables this to be done. 

 This, the first part of the Catalogue, will be followed by others, as 

 soon as it is possible to complete the necessary examination of col- 

 lections and authorities. 



ALFEED E. C. SELWYN. 



Ottawa, May, 1883. 



