52 
No. 229. 
Acacia Mabellce Maiden. 
Mabel's Wattle. 
(Family LEGUMINOS^E : MIMOSE^E.) 
Botanical description. Genus, Acacia. (See Part XV, p. 103). 
Botanical description. Species, Mahdlce Maiden, in Proc. Roy. Soc. N.S.W. xlix, 
475 (1915). 
Arbor umbrosa mediocriter alta, trunco usque ad 1' diametro, surculis junioribus et rhachibtis 
inflorescentico brevibus pilis aureis tectis. Phyllodiis longis angusto-lanceolatis apice obtuso, ad 30 cm. 
longis et longioribus, circa 1 cm. latis. Nervis mediis marginalibusque prominentibus, lateralibns 
obscurissimis. Glandula non conspicua basi 1 cm. remota. Inflorescentia racemosa, capitulis circa 9-13 
floris. Calyce corollae aequilonga, calyce truncata vel fere truncata. Sepaloruru apicibus pubescentibus, 
petalis glabris, pistillo laeve. Legumine longiusculo latiusculoque (circa 13 x 1 cm.) subfalcato, seminibus 
longitudinaliter dispositis ; seminis filiforme funiculo semen bis circumcingente, in clavatum arillum apicc 
seminis terminante. Species A. retinmles Schlecht, proxima videtur. 
An umbrageous tree of moderate height (up to 30 feet), with a trunk diameter up to a foot. 
Branchlets angular. The young shoots and the rhachises of the inflorescence densely covered 
with short, golden-yellow hairs. The bark of young growing trees is usually glaucous. 
Seedling. The seedling will be described by Mr. R. H. Carnbage in his papers on Acacia seedlings, 
but its differences from that of A. penninervis and A. rubida may be briefly stated in the 
following words : the young phyllodes of A. Mabellw are longer and much narrower than 
those of the other two species, and the venation is quite distinct from either. 
Phyttodes. Long narrow-lanceolate and slightly falcate. Up to 20 cm. and even longer. Width 
for the greater portion of the length about 1 cm. Rather thin in texture, blunt-pointed. 
Mid- and marginal-veins prominent, the lateral veins very faint, though visible under a lens, 
spreading. A not very conspicuous gland about 1 cm. from the base, the margin of which 
is slightly kinked at the place of the gland, and from which a rudimentary oblique vein 
sometimes proceeds. No stipules observed. 
Inflorescence racemose, the flowers borne in profusion, of a pale yellow colour, and sweet-scented. 
Flowers about nine to thirteen in the head, pentamerous, calyx and corolla of about equal length, 
calyx truncate or nearly so, glabrous except for the tips of the sepals, which are tufted with 
hairs. Petals glabrous, slightly keeled, the tips a little thickened. Pistil smooth. 
Pod moderately long, and broad, (say 13 x 1 cm.), slightly curved. Margins of the valves 
thickened and somewhat grooved, the valves more or less wrinkled, the seeds arranged 
longitudinally, distending the valves without making the pods moniliform. 
Seed with filiform funicle twice encircling it, and terminating in a clavate arillus at the top of the 
seed. The length and contour (whether kinked or not) of the funicle is subject to variation, 
as in A. rubida. 
