PREFACE. 



PAET III. 



This publication, constituting Part III. of the Catalogue of Canadian 

 Plants, ■'carries the work on to the end of the exogens and completes 

 the first volume. It is identical in form with the first two parts, with 

 the exception of a change in the style of type used in the names of 

 introduced plants ; a change which enables the names of such plants 

 to be more readily distinguished. 



The writer has again to thank Dr. Asa Gray and Mr. Serano Watson 

 for their continued assistance. To these gentlemen all doubtful forms 

 have been refeiTed for final examination and decision, with the excep- 

 tion of the Willows, which, as more fully noted on a subsequent page, 

 have been examined and revised by Mr. M. S. Bebb, of Eockford, 111. 



The addendum contains facts relating to the plants enumerated in 

 the two first parts of the volume, which have been ascertained since 

 these parts were printed, also the names of such plants as have since 

 been found, but which were not formerly known to occur in the Domin- 

 ion. To botanists throughout Canada who have co-operated with the 

 author, he tenders his heartfelt thanks, and expresses the hope that this 

 work, to which they have lent assistance, will meet with their approval. 

 The names of many such friends will be found in the addendum. 

 Thanks are especially due to Mr. D. N. St. Cyr, F.R.S.O., of the 

 Department of Public Instruction, Quebec, who by placing his large 

 collection at our disposal has enabled important additions to our know- 

 ledge of the flora of the Province of Quebec to be made. 



In conclusion, it may be added that nearly all the stations men- 

 tioned in the addendum are represented in the herbarium of the survey, 

 and that no references considered doubtful have been included. 



JOHN MACOUN. 

 Ottawa, April, 1886. 



