Acacia aulacocarpa
| New Guinea Wattle | |
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| Species: | A. aulacocarpa
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| Binomial name | |
| Acacia aulacocarpa | |
Acacia aulacocarpa (Brown salwood, Brush ironbark wattle, New Guinea Wattle, syn. Acacia aulacocarpa Benth. var. fruticosa C.T.White, Acacia aulacocarpa Benth. var. macrocarpa Benth., Acacia lamprocarpa O.Schwarz, Acacia leucodendron Benth., Racosperma aulacocarpum (Benth.) Pedley, Racosperma aulacocarpum (Benth.) Pedley var. fruticosum (C.T.White) Pedley) is a tree in the Fabaceae family. Shrubs 0.5–2 m tall or small trees 2–8 (–15) m tall, single-stemmed or sparingly branched near base, crowns spreading and blue-green. Bark smooth except very shallowly rimose on trunks of largest trees. Branchlets acutely angled for 10–25 cm (occasionally more) below the apex, slender to sub-stout, glabrous. Phyllodes mostly dimidiate to subfalcate, (3–) 5–12.5 cm long, 0.7–3.5 cm wide, glabrous, subglaucous to glaucous with a slight sheen; longitudinal nerves numerous, close (3–4 per mm) and parallel, not anastomosing; pulvinus 4–8 (10) mm long. Inflorescences simple, 1–2 (–4) per axil; peduncles mostly 4–8 mm long, glabrous; spikes 2–5 (–6) cm long, bright golden. Flowers 5-merous; calyx shallowly dissected; ovary densely hairy. Pods 1.5–8 cm long, usually 0.8–1.5 cm wide, straight to shallowly curved, dehiscing along dorsal suture, woody, conspicuously resinous, reddish-brown, prominently nerved, the nerves broad, sharply defined, prominently raised, oblique to longitudinally oblique and sparingly anastomosing. Seeds oblique, ovoid to obloid or ellipsoid, 3.5–5 mm long, 2–3 mm wide; funicle/aril 2–6 mm long (unextended).
Acacia aulacocarpa has a discontinuous distribution along coastal areas and adjoining tablelands of the Great Dividing Range in eastern Qld from the Mt. Windsor Tableland ( c. 25 km east of Daintree), to just south of Brisbane and into northern N.S.W. near Grafton. Recorded also from Qld continental islands of Hinchinbrook, North Keppel and Deloraine (Whitsunday Group) Islands. Despite its extensive distribution it is a relatively uncommon species as populations tend to be locally confined to creek banks or run-on sites near rock outcrops. Flowers Jan. – June
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