Carr, G.W. (February 1991), New taxa in Caladenia R.Br., Chiloglottis R.Br. and Gastrodia R.Br. (Orchidaceae) from south eastern Australia. Indigenous Flora and Fauna Association Miscellaneous Paper 1: 4 [tax. nov.]

• Type: "Dergholm, south west Victoria, 37°22'S., 141°13'E., Victorian plant grid D20, x.1990, P.F.Horsfall s.n. (Holotype: MEL 223591)."

Clements, M.A. (24 May 1993), The status of recently named orchids from eastern Australia. Muelleria 8(1): 70 [secondary reference]

taxonomic synonym: Caladenia haemantha D.L.Jones legitimate

Entwisle, T.J. in Walsh, N.G. & Entwisle, T.J. (ed.) (1994), Orchidaceae. Flora of Victoria Edn. 1, 2: 791-792 [secondary reference]

taxonomic synonym: Caladenia haemantha D.L.Jones legitimate

Bishop, A. (1996), Field guide to the orchids of New South Wales and Victoria Edn. 1: 154-155, Plate 373 [secondary reference]

Threatened Species and Communities Section, Biodiversity Group, Environment Australia (8 July 1998), Endangered Species Protection Act 1992. Schedules 1, 2 & 3: 17 [secondary reference]

Bishop, A. (2000), Field guide to the orchids of New South Wales and Victoria Edn. 2: 154-155, Plate 373 [secondary reference]

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): 394 [basionym]

basionym of: Arachnorchis formosa (G.W.Carr) D.L.Jones & M.A.Clem. legitimate

Jeanes, J.A. in Ross, J.H. & Walsh, N.G. (June 2003), Orchidaceae. A Census of the Vascular Plants of Victoria Edn. 7: 17, 19 [secondary reference]

nomenclatural synonym: Arachnorchis formosa (G.W.Carr) D.L.Jones & M.A.Clem. legitimate taxonomic synonym: Caladenia haemantha D.L.Jones 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): 192-193 [secondary reference]

nomenclatural synonym: Arachnorchis formosa (G.W.Carr) D.L.Jones & M.A.Clem. legitimate taxonomic synonym: Caladenia haemantha D.L.Jones legitimate taxonomic synonym: Calonema haemanthum (D.L.Jones) Szlach. legitimate taxonomic synonym: Calonemorchis haemantha (D.L.Jones) Szlach. legitimate

Barker, W.R., Barker, R.M., Jessop, J. & Vonow, H. (ed.) (18 March 2005), Census of South Australian Vascular Plants 5th Edition. Journal of the Adelaide Botanic Gardens Supplement 1: 193 [secondary reference]

nomenclatural synonym: Arachnorchis formosa (G.W.Carr) D.L.Jones & M.A.Clem. legitimate taxonomic synonym: Caladenia haemantha D.L.Jones legitimate taxonomic synonym: Calonema haemanthum (D.L.Jones) Szlach. legitimate taxonomic synonym: Calonemorchis haemantha (D.L.Jones) Szlach. legitimate pro parte misapplication: Caladenia patersonii R.Br. legitimate by Weber, J.Z. & Bates, R. in Jessop, J.P. & Toelken, H.R. (ed.) (1986), Orchidaceae. Flora of South Australia Edn. 4, 4: -

• APC Dist.: SA, Vic

Jones, D.L. in Banks, D.P. (ed.) (2006), Miscellaneous new species of Australian Orchidaceae. Australian Orchid Research 5: 49 [nomenclatural synonym]

nomenclatural synonym of: Arachnorchis formosa (G.W.Carr) D.L.Jones & M.A.Clem. legitimate

Backhouse, G., Kosky, B., Rouse, D. & Turner, J. (2016), Bush Gems: A Guide to the Wild Orchids of Victoria, Australia: [p. 164 (photo). pp. 213-214 (photos, map) of PDF] [secondary reference]

nomenclatural synonym: Arachnorchis formosa (G.W.Carr) D.L.Jones & M.A.Clem. legitimate taxonomic synonym: Caladenia haemantha D.L.Jones legitimate common name: Scarlet Spider-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: 8, 93, 110 [secondary reference]

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

nomenclatural synonym: Arachnorchis formosa (G.W.Carr) D.L.Jones & M.A.Clem. legitimate taxonomic synonym: Caladenia haemantha D.L.Jones legitimate taxonomic synonym: Calonema haemantha Szlach. orth. var. taxonomic synonym: Calonema haemanthum (D.L.Jones) Szlach. legitimate taxonomic synonym: Calonemorchis haemantha (D.L.Jones) Szlach. legitimate pro parte misapplication: Caladenia patersonii R.Br. legitimate by Weber, J.Z. & Bates, R. in Jessop, J.P. & Toelken, H.R. (ed.) (1986), Orchidaceae. Flora of South Australia Edn. 4, 4: -

• APC Dist.: SA, Vic

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 105 [secondary reference]

nomenclatural synonym: Arachnorchis formosa (G.W.Carr) D.L.Jones & M.A.Clem. legitimate common name: Scarlet Spider Orchid [n/a]

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