Maiden, J.H. (1920), Notes on Acacias, No. IV, with descriptions of new species. Journal and Proceedings of the Royal Society of New South Wales 53: 199 [tax. nov.]

• Type: "Type from Leura, Blue Mountains, N.S.W. (A.A. Hamilton) in National Herbarium of New South Wales."

• Comment: Acacia obtusata var. hamiltonii Maiden is cited in synonymy, however Maiden definitely indicates a different type and described the species as new.

Beadle, N.C.W., Evans, O.D. & Carolin, R.C. (1962), Handbook of the Vascular Plants of the Sydney District and Blue Mountains: 226, 227 [secondary reference]

common name: Hamilton's Wattle [n/a]

Pedley, L. (29 February 1980), A revision of Acacia Mill. in Queensland, Part 2. Austrobaileya 1(3): 286-287 [secondary reference]

nomenclatural synonym: Acacia obtusata var. hamiltonii Maiden legitimate taxonomic synonym: Acacia lunata var. crassiuscula Maiden & Betche ex Maiden legitimate taxonomic synonym: Acacia linearifolia A.Cunn. ex Maiden & Blakely legitimate

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 148 [secondary reference]

taxonomic synonym: Acacia obtusata var. hamiltonii Maiden legitimate

Morrison, D.A. & Davies, S.J. in Harden, G.J. (ed.) (1991), Acacia. Flora of New South Wales 2: 377 [secondary reference]

Maslin, B.R. (18 September 1994), Notes on Acacia adunca and A. linearifolia, and the description of a new subspecies of A. juncifolia (Leguminosae: Mimosoideae) from eastern Australia. Telopea 6(1): 46 [taxonomic synonym]

taxonomic synonym of: Acacia adunca A.Cunn. ex G.Don legitimate

Maslin, B.R. in Orchard, A.E. & Wilson, A.J.G. (ed.) (2001), Flora of Australia 11A: 301-302, Fig. 22, Map 127 [secondary reference]

• Type: Leura, N.S.W. Dec. 1907, A.A.Hamilton ; syn: NSW; Leura, N.S.W., Sept. 1908, A.A.Hamilton ; syn: NSW; isosyn: BM n.v. , fide L.Pedley, Austrobaileya 1: 286 (1980), PERTH; Leura, N.S.W., Dec. 1910, A.A.Hamilton ; syn: NSW; isosyn: AD, B, E, K, MEL, MO, NY, PERTH, TL, US, Z; Leura, N.S.W., 2 Oct. 1911, A.A.Hamilton ; ?syn: NSW, as ‘J.G.Hamilton'; isosyn: PERTH; Leura, N.S.W., Sept. 1912, A.A.Hamilton ; ?syn: K, MEL-?specimens seen by Maiden.

taxonomic synonym: Acacia sieberiana Tausch nom. inval., nom. nud. taxonomic synonym: Acacia obtusata var. hamiltoni Maiden orth. var. taxonomic synonym: Acacia obtusata var. hamiltonii Maiden legitimate pro parte misapplication: Acacia crassiuscula H.L.Wendl. legitimate by Bentham, G. (5 October 1864), Flora Australiensis 2: 372 misapplication: Acacia linearifolia A.Cunn. manuscript name by Maslin, B.R. (18 September 1994), Notes on Acacia adunca and A. linearifolia, and the description of a new subspecies of A. juncifolia (Leguminosae: Mimosoideae) from eastern Australia. Telopea 6(1): 45 common name: Hamilton's Wattle [n/a]

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

taxonomic synonym: Acacia obtusata var. hamiltonii Maiden legitimate common name: Hamilton's Wattle [n/a]

Kodela, P.G. & Harden, G.J. in Harden, G.J. (ed.) (2002), Acacia. Flora of New South Wales Revised Edition 2: 458 [secondary reference]

common name: Hamilton's Wattle [n/a]

Pedley, L. (3 December 2003), A synopsis of Racosperma C.Mart. (Leguminosae: Mimosoideae). Austrobaileya 6(3): 467 [basionym]

basionym of: Racosperma hamiltonianum (Maiden) Pedley legitimate

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

nomenclatural synonym: Racosperma hamiltonianum (Maiden) Pedley legitimate taxonomic synonym: Acacia sieberiana Tausch nom. inval., nom. nud. taxonomic synonym: Acacia obtusata var. hamiltoni Maiden orth. var. taxonomic synonym: Acacia obtusata var. hamiltonii Maiden legitimate taxonomic synonym: Acacia linearifolia A.Cunn. manuscript name pro parte misapplication: Acacia crassiuscula H.L.Wendl. legitimate by Bentham, G. (5 October 1864), Flora Australiensis 2: 372

• APC Dist.: NSW

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