George, A.S. (5 May 1971), A check list of the Orchidaceae of Western Australia. Nuytsia 1(2): 170, 173 [comb. nov.]

basionym: Caladenia dilatata var. rhomboidiformis E.Coleman legitimate

• Text: Coleman cites "Busselton, Capel, Forest Grove, Augusta, Boyup Brook, Mundaring, Waterloo, Sept., Oct., 1928, 1929. For specimens, Sept. and Oct., 1928, I am indepted to Miss Edna Corker, Mr. C. hill, Mr. S. Mitchell and Rev. E. Bryant ... Specimens... are in the Melbourne Herbarium". A sheet 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. The taxon is very similar to C. longiclavata differing essentially in the acuminate, not clubbed, petals.

Hoffman, N. & Brown, A. (1984), Orchids of South-West Australia: 104-105 [secondary reference]

Jones, D.L. (1988), Native Orchids of Australia: 126 [secondary reference]

common name: Spider Orchid [n/a]

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

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

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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