Coleman, E. (1930), A new Caladenia. The Victorian Naturalist 46: 197 [tax. nov.]

• Type: "West Australia, Busselton, Capel, Forest Grove, Augusta, Boyup-Brook, Mundaring, Waterloo. September, October, 1928, 1929."

George, A.S. (5 May 1971), A check list of the Orchidaceae of Western Australia. Nuytsia 1(2): 173 [secondary reference]

• Lectotype: "A sheet at MEL 1002422 – bears three mounted and two dissected specimens, with the details more or less as above. It is now impossible to assign the specimens to individual collections. As there is some slight variation in morphology, one of the mounted specimens is selected as Lectotype."

George, A.S. (5 May 1971), A check list of the Orchidaceae of Western Australia. Nuytsia 1(2): 173 [basionym]

basionym of: Caladenia longiclavata var. rhomboidiformis (E.Coleman) A.S.George legitimate

Clements, M.A. in Jones, D.L. (ed.) (August 1989), Catalogue of Australian Orchidaceae. Australian Orchid Research 1: 30 [secondary reference]

• Type: "'Busselton, Capel, Forest Grove, Augusta, Boyup Brook, Mundaring, Waterloo', Sep.-Oct. 1928, 1929, E. Corker, C. Hill, S,. Mitchell & E. Bryant s.n. (lecto MEL!, syn MEL!)."

Clements, M.A. in Jones, D.L. (ed.) (August 1989), Catalogue of Australian Orchidaceae. Australian Orchid Research 1: 30 [basionym]

basionym of: Caladenia rhomboidiformis (E.Coleman) M.A.Clem. & Hopper legitimate

Szlachetko, D.L. (28 February 2001), Genera et species Orchidalium. 1. Polish Botanical Journal 46(1): 19 [basionym]

basionym of: Calonema rhomboidiforme (E.Coleman) Szlach. legitimate

Jones, D.L., Clements, M.A., Sharma, I.K. & Mackenzie, A.M. (September 2001), A new classification of Caladenia R.Br. (Orchidaceae). The Orchadian 13(9): 396 [basionym]

basionym of: Arachnorchis rhomboidiformis (E.Coleman) D.L.Jones & M.A.Clem. legitimate

Hopper, S.D. & Brown, A.P. (21 September 2001), Contributions to Western Australian orchidology: 2. New taxa and circumscriptions in Caladenia. Nuytsia 14(1/2): 143 [nomenclatural synonym]

nomenclatural synonym of: Caladenia rhomboidiformis (E.Coleman) M.A.Clem. & Hopper legitimate

Szlachetko, D.L. (July 2002), Nomenclatural adjustments in the Thelymitroideae (Orchidaceae). Polish Botanical Journal 46(2): 142 [basionym]

basionym of: Calonemorchis rhomboidiformis (E.Coleman) Szlach. legitimate

Hopper, S.D. & Brown, A.P. (29 April 2004), Robert Brown's Caladenia revisited, including a revision of its sister genera Cyanicula, Ericksonella and Pheladenia (Caladeniinae: Orchidaceae). Australian Systematic Botany 17(2): 197 [nomenclatural synonym]

nomenclatural synonym of: Caladenia rhomboidiformis (E.Coleman) M.A.Clem. & Hopper legitimate

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

nomenclatural synonym of: Caladenia rhomboidiformis (E.Coleman) M.A.Clem. & Hopper legitimate

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 136 [nomenclatural synonym]

nomenclatural synonym of: Caladenia rhomboidiformis (E.Coleman) M.A.Clem. & Hopper legitimate

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