Brown, R. (27 March 1810), Prodromus florae Novae Hollandiae et insulae Van-Diemen, exhibens characteres plantarum quas annis 1802-1805: 321 [tax. nov.]

• Type: "(J.) D. Bauer. v.s."

Poiret, J.L.M. in Lamarck, J.-B.P.A. de M. de & Poiret, J.L.M. (3 July 1812), Encyclopédie Méthodique, Botanique Suppl. 2(2): 571 [basionym]

basionym of: Epipactis caudata (R.Br.) Poir. legitimate

Mueller, F.J.H. von (1875), Census of the plants of Tasmania, instituted in 1875. Monthly Notices of Papers and Proceedings of the Royal Society of Tasmania 1874: 90 [secondary reference]

Mueller, F.J.H. von (1882), Systematic Census of Australian Plants: 113 [secondary reference]

Mueller, F.J.H. von (1886), Systematic Census of Australian Plants Suppl. 3: 5 [secondary reference]

Rodway, L. (1903), The Tasmanian Flora: 201 [secondary reference]

Dixon, W.A. (1906), The Plants of New South Wales: 262 [secondary reference]

Sulman, F. (1914), A Popular Guide to the Wild Flowers of New South Wales II: 213, 237 [secondary reference]

Rogers, R.S. in Black, J.M. (1922), Orchidaceae. Flora of South Australia 1: 130, pl. 7, Fig. 1-6 [secondary reference]

• Etymology: Tailes, referring to the dorsal sepal.

Black, J.M. (1943), Flora of South Australia Edn. 2, 1: 226, Fig. 297, i (1-6) [secondary reference]

• Etymology: "tailed, referring to the dorsal sepal"

Rupp, H.M.R. (January 1944), The Orchids of New South Wales: 46 [secondary reference]

Beadle, N.C.W., Evans, O.D. & Carolin, R.C. (1962), Handbook of the Vascular Plants of the Sydney District and Blue Mountains: 470 [secondary reference]

Curtis, W.M. (1980), Angiospermae: Orchidaceae. The Student's Flora of Tasmania 4A: 117, Fig. 21 [secondary reference]

common name: Mayfly Orchid [n/a]

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 26 [secondary reference]

Jones, D.L. (1988), Native Orchids of Australia: 386-387 [secondary reference]

common name: Mayfly Orchid [n/a]

Jones, D.L. in Stanley, T.D. & Ross, E.M. (1989), Acianthus. Flora of South-eastern Queensland 3: 418 [secondary reference]

common name: Mayfly Orchid [n/a]

Clements, M.A. in Jones, D.L. (ed.) (August 1989), Catalogue of Australian Orchidaceae. Australian Orchid Research 1: 9 [secondary reference]

• Lectotype: "`Port Jackson; vicinity of Sydney and Parramatta', 1804, F. Bauer s.n. (lectotype specimen (a) BM! here designated)."

nomenclatural synonym: Epipactis caudata (R.Br.) Poir. legitimate taxonomic synonym: Acianthus caudatus var. ater Lindl. legitimate taxonomic synonym: Acianthus caudatus var. pallidus Rupp legitimate

Bates, R.J. & Weber, J.Z. (7 December 1990), Orchids of South Australia: 32 (map), Figs 50-51, Plates 21 & 24 [secondary reference]

common name: Mayfly Orchid [n/a]

• Etymology: "The name caudatus (tailed) refers to the long filamentous (or caudate) sepals."

Jones, D.L. in Harden, G.J. (ed.) (1993), Acianthus. Flora of New South Wales 4: 216 [secondary reference]

nomenclatural synonym: Acianthus caudatus var. pallidus Rupp legitimate common name: Mayfly Orchid [n/a]

Entwisle, T.J. in Walsh, N.G. & Entwisle, T.J. (ed.) (1994), Orchidaceae. Flora of Victoria Edn. 1, 2: 831, Fig. 175a-c [secondary reference]

common name: Mayfly Orchid [n/a]

Kores, P.J. in Holttum, R.E. (1995), A systematic study of the genus Acianthus (Orchidaceae: Diurideae). Allertonia 7(3): 195-198, Fig. 44 [secondary reference]

taxonomic synonym: Epipactis caudata (R.Br.) Poir. legitimate taxonomic synonym: Acianthus caudatus var. ater Lindl. legitimate taxonomic synonym: Acianthus caudatus var. pallidus Rupp legitimate

Bishop, A. (1996), Field guide to the orchids of New South Wales and Victoria Edn. 1: 172, Plate 409 [secondary reference]

common name: Mayfly Orchid [n/a]

Jones, D.L., Wapstra, H., Tonelli, P. & Harris, S. (1999), The Orchids of Tasmania: 43 [secondary reference]

common name: Mayfly Orchid [n/a]

• Etymology: "tailed (flower parts)"

Bishop, A. (2000), Field guide to the orchids of New South Wales and Victoria Edn. 2: 172, Plate. 409 [secondary reference]

common name: Mayfly Orchid [n/a]

Bostock, P.D. & Harris, W.K. in Henderson, R.J.F. (ed.) (2002), Orchidaceae. Names and Distribution of Queensland Plants, Algae and Lichens: 134 [secondary reference]

Jones, D.L., Clements, M.A., Sharma, I.S., Mackenzie, A.M. & Molloy, B.P.J. (January 2002), Nomenclatural notes arising from studies into the Tribe Diurideae (Orchidaceae). The Orchadian 13(10): 441 [basionym]

basionym of: Nemacianthus caudatus (R.Br.) 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, 23 [secondary reference]

nomenclatural synonym: Nemacianthus caudatus (R.Br.) D.L.Jones & M.A.Clem. 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: 191 [secondary reference]

nomenclatural synonym: Acianthus caudatus R.Br. var. caudatus legitimate nomenclatural synonym: Nemacianthus caudatus (R.Br.) D.L.Jones & M.A.Clem. legitimate pro parte taxonomic synonym: Acianthus caudatus var. pallidus Rupp legitimate

Backhouse, G., Kosky, B., Rouse, D. & Turner, J. (2016), Bush Gems: A Guide to the Wild Orchids of Victoria, Australia: [p.18 of PDF] (photos, map) [secondary reference]

nomenclatural synonym: Nemacianthus caudatus (R.Br.) D.L.Jones & M.A.Clem. legitimate common name: Mayfly 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: 94 [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: 4, 67, 82, 93, 105, 110 [secondary reference]

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

nomenclatural synonym: Epipactis caudata (R.Br.) Poir. legitimate nomenclatural synonym: Acianthus caudatus R.Br. var. caudatus legitimate nomenclatural synonym: Nemacianthus caudatus (R.Br.) D.L.Jones & M.A.Clem. legitimate taxonomic synonym: Acianthus caudatus var. ater Lindl. legitimate taxonomic synonym: Acianthus caudatus var. pallidus Rupp legitimate

• APC Dist.: SA, Qld, NSW, Vic, Tas

Jones, D.L. (January 2021), Native Orchids of Australia Edn. 3: 47 [secondary reference]

nomenclatural synonym: Epipactis caudata (R.Br.) Poir. legitimate nomenclatural synonym: Nemacianthus caudatus (R.Br.) D.L.Jones & M.A.Clem. legitimate taxonomic synonym: Acianthus caudatus var. ater Lindl. legitimate taxonomic synonym: Acianthus caudatus var. pallidus Rupp legitimate common name: Dead Horse [n/a] common name: Mayfly Orchid [n/a]

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