Acacia tephrina Pedley, Austrobaileya 1: 342 (1981)
Tree to 20 m high. Bark fissured and flaky, dark grey. Branchlets densely silvery white appressed-puberulous, often glabrescent. Phyllodes linear, straight to shallowly recurved, 7–11 (–15) cm long, 2–4.5 (–6) mm wide, arcuate-acuminate, densely silvery white appressed-puberulous (the hairs confined to between the nerves with age), with numerous closely parallel, fine nerves. Inflorescences 2–10-headed racemes; raceme axes 1–8 mm long, densely appressed-puberulous; peduncles 4–12 mm long, densely appressed-puberulous, the hairs pale yellow ageing white; heads globular, 4.5 mm diam., 20–35-flowered, golden. Flowers 5-merous; sepals at least 3/4-united. Pods linear, straight-edged, flat, scarcely raised over seeds, to 6.5 cm long, 5–6 mm wide, coriaceous, densely silvery appressed-puberulous; marginal nerve evident. Seeds longitudinal, 5.5 mm long; aril small.
Disjunct, occurring on Brunchilly and Benmara Stns, Barkly Tableland, N.T., and also in central Qld, mostly W of the Great Divide, from Einasleigh S to near Cunnamulla, but reaching the coast near Bowen. Grows mainly in heavier soils, including alkaline and saline clays, in tall open woodland and, in drier areas, low woodland and shrubland.
Related to A. maconochieana . Formerly confused with A. cana .
Type of accepted name
10 miles [16 km] N of Hughenden township, Burke District, Qld, 24 June 1953, M.Lazarides 3613 ; holo: BRI; iso: CANB, DNA, K, NSW, PERTH.
Racosperma tephrinum (Pedley) Pedley, Austrobaileya 2: 356 (1987). Type: as for accepted name.
B.R.Maslin, in J.P.Jessop (ed.), Fl. Central Australia 123, fig. 160G (1981); J.W.Turnbull (ed.), Multipurpose Austral. Trees & Shrubs 202- 203 (1986).
N.T.: c. 2 km N of Benmara HS, B.W.Strong 256 (DNA); No. 11 Bore, Brunchilly Stn, B.W.Strong 318 (DNA). Qld: 42 km S of Bowen on main highway, I.B.Armitage 1190 (NSW, PERTH); 4 miles [6.4 km] SE of Einasleigh, L.Pedley 2113 (BRI n.v ., K, NSW).
(RSC & BRM)