- 22 FOREST VEGETATION, 
i 
so many and varied considerations, which are intimately blended 
one with the other, as to render it almost impossible to even touch 
upon them all in a brief paper like 
H 
this 
aving been disappointed in arrangements which I had made’ 
for the illustration of my remarks by photographs of portions of 
the characteristic forests of this district, have adopted what I 
conceive to be the next best course, viz., that of igen 
them with specimens of the principal timbers and soil. The speci- 
mens number about sixty, and I trust will give a pe tien e clear 
idea of the various combinations of soils an I 
purpose to consider. Of the genus Eucalyptus, which occupies 
by far the most prominent place i in the forests of New England, 
T have collected twenty species. The total number inhabiting 
elevated and colder regions of New England, and many varieties 
which are common i n the region to the - west of the tauleuat do 
“not encroach npon its sitar defined limits, there are yet some 
which, I believe, are peculiar to it. Those are, at any rate, not 
found on or below either of the slo es, nor have I'seen them 
in any other part of the Colony north or west of Murrurundi. 
Asaninstance of this change of species, which oecupy ap- 
ntly the same relative positions in different localities, and as 
chawinge the difficulty of defining any general conelusions from 
observations in any one district, I will mention the river gum 
of the interior - rostrata). This tree, ee to ie Woolls, 
does not oceur at all to the east of the Dividing Range. It is, 
the waters from the Mooki and Namoi Rivers north to the Duma- 
resq. It lines the banks of those rivers to within a few miles of 
the plateau, when it esas sigs its place to the river — 
one of the Casuarine. On the plateau, re the 
which occupies the place of BE rostrata under exactly the wane 
conditions, so far as soil and geological form pe are concerned, is 
wn by the I 8 
0. 8). 
name is probably a corruption of Z. saligna. (Ido not think, 
however, that this is the species which frequents the low grounds 
about Parramatta, as mentioned by Dr. Woolls in his “ Flor 
ustralia,” p. 231.) But on the eastern waters a species distinct 
ct . 
appe TO; ese ree 
10w that they are not esd influenced and kept seithin their own 
