45 
gradually into the pedicel ; the operculum similar in shape and 
size, often bent or curved at the top. 
Filaments yellow, the anthers with two parallel cells joined 
together for their whole length, and with a very large gland at 
the back. 
Fruits. — In branchlets forming a compound panicle, the 
individual fruits sub-cylindrical, about 6 mm. long and 5 or 6 mm. 
broad, sharply separated from the pedicel. Capsule well sunk 
below the orifice, valves three or four. 
In honour of Dr. Alexander Morrison, formerly Government 
Botanist of Western Australia, who has done so much to diffuse 
a knowledge of the vegetation of his State. 
E. Morrisoni belongs to the somewhat heterogeneous group 
(as regards affinities) of species with perfoliate or otherwise strictly 
opposite (sessile) leaves in the mature stage. 
It would appear from B. FI. in. 187, that Bentham did not 
attach much importance to shape of sucker or juvenile leaves. 
Nevertheless he used these young leaves to some extent for 
classification purposes, e.g., “ Leaves in the young saplings of 
many species and perhaps all in some species (my italics), horizontal, 
opposite, sessile and cordate ” (B. FI. in, 185). 
Some species so included in Bentham’s time are now known 
not to be sessile throughout life, and it is very possible that, as 
time goes on, it will be found that all Eucah'pts are heteroblastic 
(blastos, a shoot), i.e., having juvenile leaves different from 
mature ones. This, if proved, will come about in two ways, by 
(a) the discovery of two kinds of leaves on existing isoblastic 
species, or ( b ) the discovery of two species (now accounted iso- 
blastic), one with cordate, etc., leaves entirely, and the other 
with usual falcate, etc., leaves entirely to be conspecific. 
We have much to learn in regard to the effect of changed 
environment on different species of Eucalyptus, and experiments 
in cultivation have thrown, and will continue to do so, much 
light upon variation in this direction. 
So far as I know, the only species of Eucalyptus (in addition 
to the present one) which are isoblastic are : — 
1. E. pulvigera. A. Cunn. A rare New South Wales species. 
2. E. cordata, Labill. A Tasmanian species. 
3. E. macrocarpa, Hook. A very coarse Western Australian 
species. 
4. E. pruinosa, Schauer. Indigenous to Western Australia, 
North Australia, North Queensland. (I have seedlings of this 
species raised from seed collected by Prof. Baldwin Spencer, at 
Whanalowra [?], Northern Territory, in 1903, which are distinctly 
pedicellate !) 
5. E. ferruginea, Schauer. With sessile cordate rusty 
pubescent leaves — an Angophoroid species from Western Australia 
and North Australia. 
