Acacia tetraptera Maslin, Nuytsia 12: 405 (1999)
Spreading, open shrub 0.2–0.7 m high; branches slender. Branchlets puberulous to tomentulose. Phyllodes patent, asymmetric, widely ovate to widely depressed-ovate or oblate, 2.5–4 mm long, 2.2–4 mm wide, obtuse to acute, apiculate and mucronate, coarsely pungent, thick, smooth and turgid (fresh) but midrib strongly raised when dry, glabrous. Inflorescences simple, 2 per axil; peduncles, 4–8 mm long, glabrous; heads globular, 4–5 mm diam., 20–30-flowered, bright light golden to mid-golden. Flowers 5-merous; sepals free. Pods strongly arcuate to subcoiled, subterete, to 2 cm long, c. 2 mm wide, coriaceous to thinly crustaceous, black, glabrous. Seeds longitudinal, oblong, c. 2 mm long, mottled grey and black; aril conical, yellow.
Occurs from near Hyden and Mt Holland ESE to near Grass Patch, south-western W.A. Grows in loam or sand over clayey loam.
One collection (from 10 km W of Peak Eleanora, M.A.Burgman & S.McNee 2231 , PERTH) appears to represent a possible hybrid with A. merrallii .
Type of accepted name
Fields Rd, 11 km N of Rolland Rd, c. 50 km due ENE of Grass Patch, 14 Aug. 1985, B.R.Maslin 5793 ; holo: PERTH; iso: CANB, G, K, MEL, NY.
W.A.: The Pimple, 40 km E of Hyden, K.J.Atkins 1579 (PERTH); Peak Charles turn-off on Lake King- Kumarl road, B.R.Maslin 5792 (AD, BRI, CANB, G, MEL, MO, NSW, PERTH); 7.5 km E of Grass Patch, D.J.McGillivray 3635 & A.S.George (PERTH).