Acacia binervata DC., Prodr . 2: 452 (1825)
Two-veined Hickory
Bushy tree 3–10 m high. Bark brown to grey. Branchlets glabrous. Phyllodes narrowly ovate to narrowly elliptic, straight to shallowly falcately recurved, 7–16 cm long, usually 1–3 cm wide, acuminate, thin, glabrous, prominently 2-nerved per face, sometimes a less prominent third nerve present, with minor nerves forming a fine open reticulum; gland 1–2.5 cm above pulvinus; margin commonly indented at gland which often touches the adaxial longitudinal nerve or is connected to it by a fine oblique nerve. Inflorescences 7–12-headed racemes, sometimes in panicles; raceme axes 3–6 cm long, glabrous or subglabrous, sometimes growing out; peduncles 6–12 mm long, glabrous; heads globular, 15–25-flowered, creamy yellow. Flowers 5-merous; sepals united. Pods to 14 cm long, 8–15 mm wide, thinly crustaceous-coriaceous, glabrous. Seeds longitudinal, oblong-elliptic, c. 5 mm long, slightly shiny, black; funicle thickly filiform, 1/2 to wholly encircling seed, black (dry); aril clavate.
Extending from near Narooma, N.S.W., N to Mt Tamborine in south-eastern Qld. Predominates in coastal areas favouring moist sites in tall forests and margins of rainforests.
Specimens from young trees at Stanwell Park, N.S.W., (e.g. J.H.Maiden , NSWl67344, PERTH) have atypically broad phyllodes (to 5 cm wide).
Very similar to A. penninervis var. longiracemosa which has 1-nerved phyllodes and short funicles not encircling the seeds. Allied to A. wardellii ; these two species seem closely allied to certain members of the ‘ A. microbotrya group’ but are readily distingushed by their 2 or 3-nerved phyllodes. Acacia bakeri possibly has some relationship with A. binervata .
Popular in cultivation.
Type of accepted name
Fl. Novae Holl. [N.S.W.], F.Sieber 504 ; holo: G-DC; iso: HAL, MO.
Synonymy
Racosperma binervatum (DC.) Pedley, Austrobaileya 2: 345 (1987). Type: as for accepted name.
Acacia umbrosa A.Cunn. ex G.Don, Gen. Hist. 2: 405 (1832). Type: native of New South Wales; n.v. , synonymy following G.Bentham, London J. Bot. 1: 380 (1842).
Illustrations
W.J.Hooker, Bot. Mag. 61, t. 3338 (1834), as A. umbrosa ; L.F.Costermans, Native Trees & Shrubs SE Australia 327 (1981); B.A.Lebler, Wildfl. SE Queensland 2: 66 (1981); M.Simmons, Acacias Australia 2: 193 (1988); T.Tame, Acacias SE Australia 63, fig. 44, pl. 44 (1992).
Representative collections
Qld: Tamborine Heights Estate, c. 64 km S of Brisbane, J.Aagard (BRI); McPherson Ra., Springbrook, Purling Brook Falls, P.Beesley 1013 & P.Ollerenshaw (NSW). N.S.W.: near Mittagong, Oct. 1963, H.Boyd (PERTH); 1.6 km S of Woolgoolga, R.Coveny 3838 & K.Thurtell (NSW, PERTH).
(BRM)
The information presented here originally appeared on the WATTLE CD-ROM which was jointly published by the Australian Biological Resources Study, Canberra, and the Department of Parks and Wildlife, Perth; it was produced by CSIRO Publishing from where it is available for purchase. The WATTLE custodians are thanked for allowing us to post this information here.
