Western Australian Herbarium (2014), FloraBase: the Western Australian Flora Version 2.9: - [primary reference]

Brown, A.P. & Brockman, G. (1 May 2015), New taxa of Caladenia (Orchidaceae) from south-west Western Australia. Nuytsia 25: 103 [taxonomic synonym]

taxonomic synonym of: Caladenia longicauda subsp. extrema A.P.Br. & G.Brockman legitimate

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

taxonomic synonym of: Caladenia longicauda subsp. extrema A.P.Br. & G.Brockman legitimate

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