Hopper, S.D. & Brown, A.P. (30 June 2006), Australia's wasp-pollinated flying duck orchids revised (Paracaleana: Orchidaceae). Australian Systematic Botany 19(3): 240-242, Figs 2, 27, 28 (map) [tax. nov.]

• Type: "Cut Hill, W of York, 31˚54'23"S, 116˚43'11"E, 15 Sep. 1907, O.H. Sargent s.n. holo: PERTH 00337307!."

• Etymology: "Named from the Latin triens (a third part), alluding to the confinement of the dark calli to projecting neck-like labellum apex, or approximately along one-third the length, of the lamina."

Brown, A., Dundas, P., Dixon, K. & Hopper, S. (2008), Orchids of Western Australia: 236 [secondary reference]

common name: Broad-billed duck orchid [n/a]

• Etymology: "a third part, alluding to the calli being confined to a third of the labellum"

Hoffman, N. & Brown, A. (2011), Orchids of South-West Australia Edn. 3: 250 [secondary reference]

common name: Broad-billed Duck Orchid [n/a]

• Etymology: "While the common name Broad-billed Duck Orchid refers to the width of the labellum the Latin name triens (a third part) refers to the calli which extend for approximately one third the length of the labellum from its apex."

Miller, J.T. & Clements, M.A. (30 June 2014), Molecular phylogenetic analyses of Drakaeinae: Diurideae (Orchidaceae) based on DNA sequences of the internal transcribed spacer region. Australian Systematic Botany 27(1): 17 [basionym]

basionym of: Caleana triens (Hopper & A.P.Br.) M.A.Clem. legitimate

Backhouse, G.N., Bates, R.J., Brown, A.P. & Copeland, L.M. (1 March 2016), Checklist of the orchids of Australia including its island territories: 30, 130 [secondary reference]

Council of Heads of Australasian Herbaria (28 February 2018), Australian Plant Census: - [nomenclatural synonym]

nomenclatural synonym of: Caleana triens (Hopper & A.P.Br.) M.A.Clem. legitimate

Hopper, S.D. & Brown, A.P. (10 December 2019), Update on generic and specific nomenclature in Paracaleana (Drakaeinae), Caladeniinae and a new name in Caladenia (Orchidaceae). Nuytsia 30: 280 [secondary reference]

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 294 [taxonomic synonym]

taxonomic synonym of: Sullivania triens D.L.Jones nom. inval.

Clements, M.A. & Jones, D.L. (19 November 2021), Notes on Australasian Orchidaceae 7: updates on the nomenclature of Sullivania (Diurideae: Drakaeinae). Lankesteriana 21(3): 316 [basionym]

basionym of: Sullivania triens (Hopper & A.P.Br.) D.L.Jones & M.A.Clem. legitimate

Brown, A. (19 July 2022), The Complete Orchids of Western Australia 2: 68 [secondary reference]

common name: Broad-billed Duck Orchid [n/a]

• Etymology: "From the Latin triens (a third part), in reference to the calli being confined to the apical third of the labellum."

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