Jones, D.L. & Clements, M.A. (1994), Pyrorchis, a new genus of Orchidaceae from Australia. Phytologia 77(6): 449-450 [comb. nov.]

basionym: Lyperanthus nigricans R.Br. legitimate nomenclatural synonym: Caladenia nigricans (R.Br.) Rchb.f. legitimate taxonomic synonym: Lyperanthus nigricans f. typica Domin nom. inval. taxonomic synonym: Lyperanthus nigricans f. pumila Domin legitimate

Bishop, A. (1996), Field guide to the orchids of New South Wales and Victoria Edn. 1: 165, Plate 393 [secondary reference]

common name: Red Beaks [n/a]

Hoffman, N. & Brown, A. (1998), Orchids of South-West Australia Edn. 2 (revised): 223 [secondary reference]

common name: Elephants' Ears [n/a] common name: Red Beaks [n/a]

Jones, D.L. in Banks, D.P. (ed.) (1998), Introduction and the genera Acianthus, Arthrochilus, X Calassodia, Calochilus, Corybas, Cyrtostylis, Dipodium, Dockrillia, Gastrodia, Leptoceras, Microtis, Pyrorchis and Townsonia. Australian Orchid Research 3: 12 [secondary reference]

nomenclatural synonym: Lyperanthus nigricans R.Br. legitimate nomenclatural synonym: Caladenia nigricans (R.Br.) Rchb.f. legitimate

Jones, D.L., Wapstra, H., Tonelli, P. & Harris, S. (1999), The Orchids of Tasmania: 250 [secondary reference]

nomenclatural synonym: Lyperanthus nigricans R.Br. legitimate common name: Red Beaks [n/a] common name: Fire Orchid [n/a]

• Etymology: "becoming black (when pressed)"

Bishop, A. (2000), Field guide to the orchids of New South Wales and Victoria Edn. 2: 165, Plate 393 [secondary reference]

common name: Red Beaks [n/a]

Wheeler, J.R., Marchant, N.G. & Lewington, M. (2002), Flora of the South West 1: 386 [secondary reference]

common name: Elephants' Ears [n/a] common name: Red Beaks [n/a]

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

Jeanes, J.A. in Ross, J.H. & Walsh, N.G. (June 2003), Orchidaceae. A Census of the Vascular Plants of Victoria Edn. 7: 23, 27 [secondary reference]

nomenclatural synonym: Lyperanthus nigricans R.Br. 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: 201 [secondary reference]

nomenclatural synonym: Lyperanthus nigricans R.Br. legitimate nomenclatural synonym: Burnettia nigricans N.Hoffman & A.P.Br. nom. inval.

Brown, A., Dundas, P., Dixon, K. & Hopper, S. (2008), Orchids of Western Australia: 298 [secondary reference]

common name: elephants' ears [n/a] common name: Red beaks [n/a]

• Etymology: "blackish, alluding to the black colouration of dead flowers"

Hoffman, N. & Brown, A. (2011), Orchids of South-West Australia Edn. 3: 267 [secondary reference]

common name: Elephant's Ears [n/a] common name: Red Beaks [n/a]

• Etymology: "The scientific name 'nigricans', meaning black, refers to the blackened appearance of the pressed flowers."

Barrett, Russell & Tay, Eng Pin (2016), Perth Plants: a Field Guide to the Bushland and Coastal Flora of Kings Park and Bold Park Edn. 2: 242-243, photos 5-8 [secondary reference]

nomenclatural synonym: Lyperanthus nigricans R.Br. legitimate common name: Red Beak Orchid [n/a]

de Salas, M.F. & Baker, M.L. (2016), Tasmanian vascular plant census. A Census of the Vascular Plants of Tasmania, including Macquarie Island: 102 [secondary reference]

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: 46, 77, 100, 107, 119, 134 [secondary reference]

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

nomenclatural synonym: Lyperanthus nigricans R.Br. legitimate nomenclatural synonym: Caladenia nigricans (R.Br.) Rchb.f. legitimate nomenclatural synonym: Lyperanthus nigricans R.Br. f. nigricans legitimate taxonomic synonym: Lyperanthus nigricans f. typica Domin nom. inval. taxonomic synonym: Lyperanthus nigricans f. pumila Domin legitimate taxonomic synonym: Burnettia nigricans N.Hoffman & A.P.Br. nom. inval. taxonomic synonym: Rostranthus nigricans Hopper & A.P.Br. manuscript name misapplication: Leptoceras pectinata Lindl. legitimate by Endlicher, S.F.L. in Lehmann, J.G.C. (ed.) (1846), Orchideae. Plantae Preissianae 2(1): 6-7

• APC Dist.: WA, SA, NSW, Vic, Tas

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 302 [secondary reference]

nomenclatural synonym: Lyperanthus nigricans R.Br. legitimate nomenclatural synonym: Caladenia nigricans (R.Br.) Rchb.f. legitimate common name: Undertaker Orchid [n/a] common name: Red Fire Orchid [n/a] common name: Red Beaks [n/a]

Brown, A. (19 July 2022), The Complete Orchids of Western Australia 2: 200 [secondary reference]

common name: Red Beaks [n/a]

• Etymology: "From the Latin niger (black), in reference to the plant turning black when dried."

---