Rogers, R.S. (1924), Petalochilus: a new genus of New Zealand orchids. Journal of Botany, British and Foreign 62: 65-66 [tax. nov.]

Clements, M.A. in Jones, D.L. (ed.) (August 1989), Catalogue of Australian Orchidaceae. Australian Orchid Research 1: 20 [taxonomic synonym]

taxonomic synonym of: Caladenia R.Br. 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): 406 [secondary reference]

• Type: Petalochilus calyciformis R.S.Rogers, here designated.

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): 185 [taxonomic synonym]

taxonomic synonym of: Caladenia R.Br. subg. Caladenia 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): 179 [taxonomic synonym]

taxonomic synonym of: Caladenia R.Br. legitimate

Jones, D.L. & Clements, M.A. (September 2005), Miscellaneous nomenclature notes and changes in Australian, New Guinea and New Zealand Orchidaceae. The Orchadian 15(1): 36 [secondary reference]

Jones, D.L. (2008), Field Guide to the orchids of the Australian Capital Territory: 280 [secondary reference]

• Etymology: "from the Greek petalon, leaf, petal and cheilos, lip; reference to the peloric petal-like labellum of the 2 species on which the genus was based"

Clements, M.A., Howard, C.G. & Miller, J.T. (1 April 2015), Caladenia revisited: results of molecular phylogenetic analyses of Caladeniinae plastid and nuclear loci. American Journal of Botany 102(4): 597 [basionym]

basionym of: Caladenia subsect. Petalochilus (R.S.Rogers) M.A.Clem. legitimate

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

taxonomic synonym of: Caladenia R.Br. legitimate

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