2-0 0L{3 1*3 1 IO e\F 
rA^^c. 
PREFACE. 
In compiling the following Catalogue I have labored under 
many difficulties owing to the want of data, and hence it is neces- 
sarily very imperfect as regards the number of species included in 
it. Orer 2900 of those enumerated have been obtained in their 
native wilds by myself, and theotheis are given on good authority. 
Much has yet to be done, and therefore, the author earnestly begs 
all Canadian botanists, into whose hands this may fall, to com- 
municate with him regarding doubtful species which they may de- 
tect or the occurrence of others not mentioned by him. As 
material accumulates addenda will be published from time to time 
so as to keep pace with the advancement of botanical knowledge 
in the Dominion. In every case a copy of them will be forwarded 
to the subscribers for this edition. 
Albert College, 
Belleville, May'lOth, 1878. 
JOHN MACOUN. 
