338 
GIANT ACACIA FROM THE BRUNSWICK RIVER, 
Hab. — Tengoggin Mt. (1000 ft.), near Mullumbimby, Brunswick 
River, N.S.W.; also Mullumbimby Creek, a tributary of the 
Brunswick (W. Bauerlen). 
According to Bentham's classification this Acacia belongs to the 
series Plurinerves, sub-section Dimidiatce. 
This is probably one of the largest of all the Acacias. It has 
been found in the Mountains measuring over 160 feet, with a 
trunk from 50-60 feet clear of limbs, and a diameter from 2 to 4 
feet, and on the banks of creeks 140 feet high, and in some 
instances " so high that the leaves could not be seen " (dis- 
tinguished). 
The flowers are small, in loose racemes with fairly long pe- 
duncles. Branches pendulous. Phyllodes vertically flattened and 
also twisted towards the base, thin, quite glabrous. The pods 
are very difficult to procure owing to their ripening and falling in 
what is usually the wettest part of the year. In many instances 
pods were caught while falling from the trees when every seed 
was found to have begun to germinate. 
They are very variable both in length and breadth, some being- 
very broad and a little constricted between the seeds, while others 
from the same tree are very narrow and much constricted, the 
valves are ail very thin. 
The bark is quite distinct from A. binervata, its nearest ally. 
It is inclined to be smooth and exudes very little gum, as far as 
seen, and is reputed to be poor in tannin. 
The timber is pale coloured right to the heart, as far as seen. 
It will be described subsequently. 
The flowers, bark, seeds and timber all emit an alliaceous odour 
when fresh, reminding one of Dysoxylon rufum. 
Its closest afiinity is with A. binervata, which it resembles in 
the penniveined reticulations of the phyllodes and in the flowering 
racemes, but differs from it in individual flowers, pod and seed. 
It ranks with A. excelsa in size and the shape of the seed and 
aril, but differs in the nervation of phyllodes, peduncles and 
flowers. 
