IV PREFACE. 



tions in the Eocky Mountains has made many valuable additions to the 

 flora of that region. In British Columbia, Mr. James Fletcher, of 

 Ottawa, has collected on Vancouver Island and in the valleys of the 

 Fraser and Thompson rivers ; while Mr. Cowley and J. A. Hill, C.E., 

 have favoured me with many interesting plants from various parts of 

 that province. 



Special thanks are due to Thomas Meehan, Esq., State Botanist of 

 Pennsylvania, for an extensive manuscript list of the species collected 

 by him on the British Columbian and Alaskan coasts, during the sum 

 mer of 1883. This list is a valuable addition to our knowledge of the 

 west coast flora. 



It is proposed to continue the present work until all known species of 

 Canadian plants are catalogued, and their geographical range recorded, 

 and the writer earnestly invites all botanical students within the 

 Dominion to assist in this necessary work. The next part will com- 

 plete the exogens, and to this an addendum will be attached bringing 

 our knowledge of the foregoing parts up to date. 



JOHN MACOUK 



