Postelstia 145 
Points concerning the local and general dis- 
tribution of some of the other species will be con- 
sidered in connection with the respective species. 
In general it can be said that the conifers of 
Vancouver Island occupy at present the regions 
which are best adapted climatically to the in- 
dividual species, and this can often be shown by 
a comparison of their local occurrence with their 
general geographical range. While some species 
may be slowly increasing their range, the whole 
Pacific coast forest region appears to be in a 
remarkable state of stability, and except where 
it has been interfered with by man, there is very 
little tendency for one species to replace another. 
The result is that over very wide areas the forests 
are practically identical in composition wherever 
the same climatic conditions obtain. Even 
where the forests have been burned or cleared 
the land becomes rapidly reforested with the 
same species wherever the burning or clearing 
is not sufficiently thorough and widespread to 
destroy the source of seed supply. 
In the following pages descriptions are given 
of all the species of conifers known to occur in 
