Acacia abrupta Maiden & Blakely, J. & Proc. Roy. Soc. W. Australia 13: 6; pl. 5, figs 11–17 (1928)
Glabrous, resinous, viscid shrub 1–2 m high. Bark light grey. Phyllodes ascending to erect, incurved, terete, infrequently subquadrangular, 2–9 cm long but commonly 3–5 cm long, 0.5–1 mm wide, obliquely truncate, excentrically mucronulate, dark green, obscurely 4-nerved; gland 0–2 mm above pulvinus, oblong to elliptic and 0.5–1 mm long, a smaller, circular gland at base of mucro. Inflorescences simple and 1 per axil or 1-headed racemes with axes 2–4 mm long; peduncles 8–12 mm long; basal bract present (on racemes) or absent (on non-racemose inflorescences); heads globular, 25-35-flowered, golden. Flowers 5-merous; sepals 1/4–1/2-united, sometimes splitting to base upon dissection. Pods linear, shallowly constricted between seeds, arcuate, biconvex, to 5 cm long, 2.5–3 mm wide, longitudinally reticulate. Seeds longitudinal, 4 mm long; aril conspicuous.
Occurs in the Arid Zone from near Newman, W.A., to near L. Amadeus, N.T. Grows on sand plains or lateritic hills with spinifex.
Type of accepted name
Victoria Desert Camp 36 [c. 26S and 127E], W.A., 31 Aug. 1891, R.Helms 11 ; holo: NSW; iso: AD, K, PERTH.
J.H.Maiden & W.F.Blakely, loc. cit. ; B.R.Maslin, in J.P.Jessop (ed.), Fl. Central Australia 119 (1981).
W.A.: 12.9 km N of Kumarina, Great Northern Hwy, M.E. Ballingall 1836 (BRI, PERTH); Warburton Region, P.E.Conrick 903 (NT, PERTH). N.T.: 17 km E Docker R., Petermann Ra., T.S.Henshall 2810 (PERTH); 8 km W of Armstrong Ck, J.R.Maconochie 1839 (AD, NSW, PERTH).