Shrub or tree, 5–10 m high, often suckering; branchlets angular, later terete, ribbed, with appressed, minute hairs or glabrous, white-resinous deposit sometimes evident. Phyllodes spreading, narrowly elliptic-oblong, 4–11 cm long, 4–9 mm wide, straight to slightly curved, rigid-coriaceous, glabrous or with few minute hairs towards base, sometimes white-resinous, curved-acute; veins numerous, obscure, closely parallel. Racemes 2- or 3-headed, rachis 1–5 mm long, sometimes with appressed, minute hairs; peduncles 2–6 mm long; heads globular, 5–8 mm diam., 20–48-flowered, golden; bracteoles oblong to obovate. Flowers 5-merous; sepals united. Pods linear, slightly raised and irregularly constricted between seeds, to 9 cm long, 3–5 mm wide, straight to slightly curved, chartaceous or coriaceous, longitudinally veined, glabrous or nearly so, margins thickened; seeds longitudinal, broadly elliptic, 3–5 mm long, dark brown, aril small, apical. Flowers Sep.
MuM, VRiv, RobP, MuF, NIS. Also Qld, NSW. Widespread in New South Wales but just crossing the Murray River into Victoria where present mainly as remnant populations in paddocks and roadsides.
Closely related to A. melvillei which has minutely pubescent phyllodes, smaller heads, broader pods with transverse seeds and more rigid and commonly broader phyllodes. It is also related to A. pendula which has densely and minutely pubescent phyllodes, smaller heads of generally fewer flowers, broad, flat legumes which have 2–3 mm wide wings and discoid, transverse seeds.
Bentham (1842) spelled the epithet "omalophylla" following A.Cunningham's manuscript name (see Pedley 1978). Since Bentham himself later corrected the name to "homalophylla" in Fl. Austral. 2: 383 (1864), which is etymologically more correct under ICBN Rec. 60A.2 (Vienna Code, 2006), the later orthography is followed here.
