Johnson, L.A.S. & Briggs, B.G. (1975), On the Proteaceae - the evolution and classification of a southern family. Botanical Journal of the Linnean Society 70(2): 175 [nom. et stat. nov.]

• Type: Triunia youngiana (F.Muell.) L.Johnson & B.G.Briggs

replaced synonym: Helicia sect. Macadamiopsis Sleumer legitimate

• Etymology: "The name is derived from the Latin tri-, three-, and unus, one (alluding to the perianth in which there are three tepals are coherent to a higher level than the fourth."

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 182 [secondary reference]

Ross, E.M. in Stanley, T.D. & Ross, E.M. (1986), Proteaceae. Flora of South-eastern Queensland 2: 14 [secondary reference]

Wrigley, J.W. & Fagg, M. (1989), Banksias, Waratahs & Grevilleas and all other plants in the Australian Proteaceae family: 543-544 [secondary reference]

• Etymology: "From Latin tri-, three and unus, one; referring to the fact that 3 perianth segments remain partially coherent and one is separated."

Harden, G.J. in Harden, G.J. (ed.) (1991), Triunia. Flora of New South Wales 2: 64 [secondary reference]

Foreman, D.B. in McCarthy, P.M. (ed.) (1995), Triunia. Flora of Australia 16: 404 APC [secondary reference]

• APC Dist.: Qld, NSW

Harden, G.J. in Harden, G.J. (ed.) (2002), Triunia. Flora of New South Wales Revised Edition 2: 79 [secondary reference]

Cooper, W.E. & Cooper, W.T. (2004), Fruits of the Australian Tropical Rainforest: 422 [secondary reference]

Weston, P.H. & Barker, N.P. (13 November 2006), A new suprageneric classification of the Proteaceae, with an annotated checklist of genera. Telopea 11(3): 334 [secondary reference]

Weston, P.H. in Kubitzki, K. (ed.) (2007), Proteaceae. The Families and Genera of Vascular Plants 9: 392 [secondary reference]

Mabberley, D.J. (1 May 2008), Mabberley's Plant-Book Edn. 3: 876 [secondary reference]

Olde, P.M. (10 August 2015), Triunia kittredgei Olde (Proteaceae: Grevilleoideae: Roupaleae), a new name for Triunia robusta sensu Foreman misapplied. Telopea 18: 189 [secondary reference]

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