Hopper, S.D. & Brown, A.P. (June 2000), New genera , subgenera, combinations, and species in the Caladenia alliance (Orchidaceae: Diurideae). Lindleyana 15(2): 123 [comb. nov.]

basionym: Caladenia gertrudae Ostenf. 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): 403 [secondary reference]

Wheeler, J.R., Marchant, N.G. & Lewington, M. (2002), Flora of the South West 1: 361 [secondary reference]

common name: Pale China Orchid [n/a]

Western Australian Herbarium (2003), FloraBase: the Western Australian Flora Version 2: - [secondary reference]

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): 220-222, Fig. 8 (map) [secondary reference]

nomenclatural synonym: Caladenia gertrudae Ostenf. legitimate nomenclatural synonym: Pentisea gertrudae (Ostenf.) Szlach. legitimate

Brown, A., Dundas, P., Dixon, K. & Hopper, S. (2008), Orchids of Western Australia: 140 [secondary reference]

common name: Pale china orchid [n/a]

• Etymology: "named for Gertrude who was the first to collect the orchid" [sic; actually named for Gertrud Hansen Ostenfeld, the illustrator of the original description of Caladenia gertrudae and the daugher of C.E.H.Ostenfeld (the author of that name)]

Hoffman, N. & Brown, A. (2011), Orchids of South-West Australia Edn. 3: 198 [secondary reference]

common name: Pale China Orchid [n/a]

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: 20, 127 [secondary reference]

Council of Heads of Australasian Herbaria (28 February 2018), Australian Plant Census: - APC [secondary reference]

orthographic variant: Cyanicula gertrudiae Hopper & A.P.Br. orth. var. orthographic variant: Cyanicula gertrudeae G.N.Backh., R.J.Bates, A.P.Br. & L.M.Copel. orth. var. nomenclatural synonym: Caladenia gertrudae Ostenf. legitimate nomenclatural synonym: Pentisea gertrudeae Szlach. orth. var. nomenclatural synonym: Pentisea gertrudae (Ostenf.) Szlach. legitimate taxonomic synonym: Cyanicula gertrudiae N.Hoffman & A.P.Br. nom. inval. taxonomic synonym: Cyanicula gertrudiae Paczk. & A.R.Chapm. nom. inval.

• APC Dist.: WA

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 193-194 [secondary reference]

nomenclatural synonym: Caladenia gertrudae Ostenf. legitimate nomenclatural synonym: Pentisea gertrudae (Ostenf.) Szlach. legitimate common name: Pale China Orchid [n/a]

Parker, C.M. & Percy-Bower, J.M. (8 March 2022), Updates to Western Australia’s vascular plant census for 2021. Nuytsia 33: 6 [secondary reference]

orthographic variant: Cyanicula gertrudiae Hopper & A.P.Br. orth. var.

Brown, A. (19 July 2022), The Complete Orchids of Western Australia 1: 230 [secondary reference]

common name: Pale China Orchid [n/a]

• Etymology: "Named in honour of Miss Gertrud Ostenfeld the daughter of Carl Ostenfeld who collected the type specimen and named the species."

Australian Biological Resources Study (ed.) (11 March 2026), Flora of Australia (Version 52380672) [Data set] Australian Biological Resources Study.: - [secondary reference]

nomenclatural synonym: Caladenia gertrudae Ostenf. legitimate nomenclatural synonym: Pentisea gertrudae (Ostenf.) Szlach. legitimate common name: Pale China Orchid [n/a]

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