14 MIMOSACEAE 
Acacia mangium 
Fig. 6 
with horizontal cuts. Branchlets flattened, glabrous. 
Stipules caducous. Pulvinus 3-4 mm long, minutely 
hairy. Phyllodes curved, elliptic to oblanceolate, 
70-180 mm long, 7-35 mm wide, L/W 4.5-10, 
glabrous, primary veins 2-3, secondary veins oblique 
or penniveined, reticulate, base attenuate, apex 
obtuse. Glands 4-5, scattered along dorsal margin to 
near base. Inflorescences extended axillary racemes 
or panicles, 9-24 heads per raceme, axis length 
65-150 mm long. Heads globular, white to cream, 
6-9 mm wide; peduncle 6-14 mm long, glabrous. 
Pods stipitate, greyish, linear to oblong, slightly 
curved, flat, 75-130 mm long, 20-28 mm wide, woody, 
smooth, glabrous, obliquely reticulately nerved or 
transversely reticulately nerved, acute. Seeds 
transverse in pod, brown, broadly ellipsoid, 10 mm 
long, 7-9 mm wide. Flowering: Apr - June; fruiting: 
Aug - Sept. Fig. 7 
An NT endemic found from the DR to western 
Arnhem Land. Common in the DR in open forest. 
May be confused with A. latescens. 
*A, mountfordiae Specht 
Erect shrub, 2-4 m high, sometimes pruinose. Bark 
grey in older plants, fissured. Branchlets terete, 
sometimes pruinose, glabrous or densely hairy, hairs 
Acacia 
erect, hyaline. Stipules persistent, white, narrow- 
triangular, 1 mm long, glabrous. Pulvinus absent. 
Phyllodes straight or rarely curved, dimidiate, 
16-49 mm long, 6-20 mm wide, L/W 1.6-2.8(4.3), 
sometimes pruinose, glabrous or densely hairy, hairs 
erect, yellow to golden, primary veins 2-3, scarcely 
visible, secondary veins obscure, closely reticulate, 
base attenuate, apex obtuse and asymmetric, mucro 
oblique, caducous. Glands 1, near base. Inflorescences 
on simple axillary peduncles, 1-2 per axil. Spikes deep 
yellow to golden, 17-45 mm long, 5-7 mm wide, 
densely flowered; peduncle 7-23 mm long, glabrous 
or hairy, rachis glabrous. Pods shortly stipitate or 
sessile, brown, linear to oblong, straight or slightly 
curved, flat, 20-52 mm long, 5-9 mm wide, 
coriaceous, slightly resinous, glabrous, longitudinally 
wrinkled, obtuse. Seeds oblique in pod, olivaceous, 
angular oblong, 4-5.5 mm long, 3-4 mm wide. 
Flowering: June - Oct; fruiting: Oct. Fig. 7 
Endemic to the Oenpelli area on sandstone. Widely 
cultivated in Darwin. 
A. multisiliqua (Benth.) Maconochie 
Erect shrub or prostrate in exposed coastal 
situations, to 2.5 m high. Bark smooth. Branchlets 
faintly ribbed, glabrous. Stipules persistent, reddish, 
triangular, 0.5 mm long, glabrous. Pulvinus 3 mm 
long, glabrous. Phyllodes straight or curved, narrow- 
elliptic to lanceolate, 20-82 mm long, 2.5-12 mm 
wide, L/W 3.3-12.9, glabrous, primary veins 3 rarely 
more on coastal forms, secondary veins parallel and 
widely spaced, sparsely or loosely anastomosing, base 
attenuate, apex acute to obtuse, mucro oblique. 
Glands 1-2, near base or scattered along dorsal 
margin. Inflorescences on simple axillary peduncles. 
Heads globular, yellow, 4-5 mm wide; peduncle 
3-6 mm long, glabrous. Pods stipitate, brown, 
moniliform, straight, raised over seeds, 35-74 mm 
long, 3-5(7) mm wide, coriaceous, smooth, glabrous, 
nerves obscure or absent, acute. Seeds longitudinal 
in pod, brown, flattened oblong or ellipsoid, 3.5-5 
mm long, 2-3 mm wide. Flowering: all year; fruiting: 
Mar - Nov. Fig. 7 
Widespread across northern Australia but uncom- 
mon in the DR. Typically found on rocky slopes. 
A. nuperrima E.G.Baker 
Spreading shrub, to 1 m high, scurfy resinous or 
mealy. Bark smooth. Branchlets ribbed, resinous 
becoming mealy or hoary with minute stellate 
crystals, glabrous. Stipules persistent, reddish, 
narrow-triangular, 1 mm long, resinous. Pulvinus 
0.2 mm long, glabrous. Phyllodes curved or straight, 
