154. 
Racemes not exceeding or equalling the phyllodes, with numerous heads of about twenty flowers, 
all 5-merous. 
Sepals thick, spathulate, angled, fringed at the top and along the angles with fine hairs, half as 
long as the corolla. Petals glabrous Ovary smooth. 
Pod | inch broad, the valves with a raised rim along the margin, the pod contracted between the 
seeds, which are longitudinally arranged. 
Seed with a club-shaped aril and a funicle short or as long as the seed, but not encircling it. 
Mr. R. T. Baker, Proc. Linn. Soc. N.S. W., xxii, Plate xxiii, has figured 
Acacia obtusata, Sieber, and at figure 2 lias figured “ Flowering twig of variety with 
small pliyllodes.” This twig came from Tallong (Barber’s Creek) (H. J. Rumsey), 
and is reminiscent of var. Hamiltoni, but the phyllodes are more attenuate-spatliul ate 
than the tyjie, have the gland usually more distant from the articulation of the 
phyllode, and the gland usually more prominent. 
With this exception, I have not found a form similar to var. Hamiltoni in 
southern New South Wales. 
Botanical Name. — Acacia, already explained (see Part XY, p. 104) ; 
Hamiltoni, in honour of Arthur Andrew Hamilton, Botanical Assistant, Botauic 
Gardens, who found this plant at Leura, Blue Mountains. 
Vernacular Name. — I know of none in actual use, and propose the name 
“ Hamilton’s Wattle” for it. 
Synonym. — A. crassiuscula, Benth. non Wendl. in part. 
Habitat. —Leura, Blue Mountains, New South Wales. So far as I know 
this is the only locality in which this Acacia has been collected since Sieber’s time, 
Mr. A. A. Hamilton having obtained it in fruit in December, 1907, and in flower in 
September, 1908. 
I collected an Acacia at Moimt Wilson in April, 1890, which is in young 
hud and doubtful, hut which appears to he this form. 
Tallong, between Moss Vale and Goulburn, is a southern form, and I expect 
this variety to be obtained in the rough country connecting the southern line and 
the western line (Blue Mountains). 
EXPLANATION OF PLATE 181. 
A. Flowering twig. 
b. Flower-head. 
c. Individual bud. 
d. Flower. 
e. Bract. 
f. Flower opened out, showing — 
(a) Calyx. 
( b) Corolla. 
(c) Pistil (stamens removed). 
g. Phyllode enlarged, showing gland (a). 
H. Pod. 
i. Heed. 
