Maslin, B.R. (7 February 1978), Studies in the genus Acacia (Mimosaceae) - 8 A revision of the Uninerves - Triangulares, in part (the tetramerous species). Nuytsia 2(5): 282-285, Figs 7, 20 (map) [tax. nov.]

• Type: "Between Harvey and Myalup, Western Australia. ... 20 Aug. 1976, B.R. Maslin 4193 (holo: PERTH; iso: CANB, K, MEL)."

pro parte misapplication: Acacia horridula Meisn. legitimate by Bentham, G. (5 October 1864), Flora Australiensis 2: 350

• Etymology: "The specific epithet refers to the shape of the phyllodes which are normally half-trullate i.e. angled (albeit obscurely) only on the adaxial margin (0.5-1.5 (2) mm above the pulvinus).

Green, J.W. (1985), Census of the Vascular Plants of Western Australia Edn. 2: 88 [secondary reference]

Wheeler, J.R. in Marchant, N.G., Wheeler, J.R., Rye, B.L., Bennett, E.M., Lander, N.S. & Macfarlane, T.D. (1987), Mimosaceae. Flora of the Perth Region 1: 229 [secondary reference]

Maslin, B.R. in Orchard, A.E. & Wilson, A.J.G. (ed.) (2001), Flora of Australia 11A: 511, Fig. 65L-N, Map 381 [secondary reference]

pro parte misapplication: Acacia horridula Meisn. legitimate by Bentham, G. (5 October 1864), Flora Australiensis 2: 350

Maslin, B.R. (9 July 2001), Wattle - Acacias of Australia: - [secondary reference]

Wheeler, J.R., Marchant, N.G. & Lewington, M. (2002), Dicotyledons. Flora of the South West 2: 672 [secondary reference]

Pedley, L. (3 December 2003), A synopsis of Racosperma C.Mart. (Leguminosae: Mimosoideae). Austrobaileya 6(3): 486 [basionym]

basionym of: Racosperma semitrullatum (Maslin) Pedley legitimate

Council of Heads of Australasian Herbaria (2006), Australian Plant Census: - APC [secondary reference]

nomenclatural synonym: Racosperma semitrullatum (Maslin) Pedley legitimate pro parte misapplication: Acacia horridula Meisn. legitimate by Bentham, G. (5 October 1864), Flora Australiensis 2: 350

• APC Dist.: WA

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