Linnaeus, C. (1 May 1753), Species Plantarum 2: 792 [tax. nov.]

• Type: "Habitat in Angliae, Galliae sylvis. Caeduis, aggeribus."

Gaertner, J. (1791), De Fructibus et Seminibus Plantarum 2(3): 368 [basionym]

basionym of: Helminthia echioides (L.) Gaertn. legitimate

Mueller, F.J.H. von (1888), Plants, hitherto immigrated and naturalized in Victoria, with indications of their nativity and English popular names. Key to the System of Victorian Plants 1: 534 [secondary reference]

Black, J.M. (1929), Bignoniaceae - Compositae. Flora of South Australia 4: 660, Fig. 328 [secondary reference]

nomenclatural synonym: Helminthia echioides (L.) Gaertn. legitimate common name: Ox-tongue [n/a]

Black, J.M. & Robertson, E.L. (1957), Flora of South Australia Edn. 2, 4: 941, Fig. 1255 [secondary reference]

nomenclatural synonym: Helminthia echioides (L.) Gaertn. legitimate common name: Ox-tongue [n/a]

Beadle, N.C.W., Evans, O.D. & Carolin, R.C. (1962), Handbook of the Vascular Plants of the Sydney District and Blue Mountains: 396 [secondary reference]

common name: Ox Tongue [n/a]

Curtis, W.M. (1963), Angiospermae: Lythraceae to Epacridaceae. The Student's Flora of Tasmania 2: 383 [secondary reference]

nomenclatural synonym: Helminthia echioides (L.) Gaertn. legitimate common name: Bristly Ox-Tongue [n/a]

Holub, J.L. (1973), Folia Geobotanica et Phytotaxonomica: 176 [basionym]

basionym of: Helminthotheca echioides (L.) Holub legitimate

Willis, J.H. (1973), A Handbook to Plants in Victoria Edn. 2, 2: 770 [secondary reference]

common name: Ox-tongue [n/a]

Cunningham, G.M., Mulham, W.E., Milthorpe, P.L. & Leigh, J.H. (1981), Plants of Western New South Wales: 717 [secondary reference]

common name: Ox-tongue [n/a]

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 84 [secondary reference]

Green, J.W. (1985), Census of the Vascular Plants of Western Australia Edn. 2: 168 [nomenclatural synonym]

nomenclatural synonym of: Helminthotheca echioides (L.) Holub legitimate

Stanley, T.D. in Stanley, T.D. & Ross, E.M. (1986), Asteraceae. Flora of South-eastern Queensland 2: 590 [secondary reference]

common name: Ox Tongue [n/a]

Lander, N.S. in Marchant, N.G., Wheeler, J.R., Rye, B.L., Bennett, E.M., Lander, N.S. & Macfarlane, T.D. (1987), Asteraceae. Flora of the Perth Region 2: 686 [nomenclatural synonym]

nomenclatural synonym of: Helminthotheca echioides (L.) Holub legitimate

Brown, E.A. in Harden, G.J. (ed.) (1992), Asteraceae p.p. Flora of New South Wales 3: 335 [nomenclatural synonym]

nomenclatural synonym of: Helminthotheca echioides (L.) Holub legitimate

Holzapfel, S. (1994), A revision of the genus Picris (Asteraceae, Lactuceae) s.l. in Australia. Willdenowia 24: 118 [nomenclatural synonym]

nomenclatural synonym of: Helminthotheca echioides (L.) Holub legitimate

Jeanes, J.A. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Asteraceae. Flora of Victoria 4: 703 [nomenclatural synonym]

nomenclatural synonym of: Helminthotheca echioides (L.) Holub legitimate

Jessup, L.W. (22 April 2002), Flora of South-eastern Queensland Volume 2 Changes to names or status of taxa: - [nomenclatural synonym]

nomenclatural synonym of: Helminthotheca echioides (L.) Holub legitimate

Thompson, I.R. (22 May 2007), A taxonomic treatment of tribe Lactuceae (Asteraceae) in Australia. Muelleria 25: 93 [nomenclatural synonym]

nomenclatural synonym of: Helminthotheca echioides (L.) Holub legitimate

Council of Heads of Australasian Herbaria (2011), Australian Plant Census: - [nomenclatural synonym]

nomenclatural synonym of: Helminthotheca echioides (L.) Holub legitimate

Holzapfel, S. in Wilson, A.J.G. (ed.) (2015), Helminthotheca. Flora of Australia 37: 141 [nomenclatural synonym]

nomenclatural synonym of: Helminthotheca echioides (L.) Holub legitimate

de Salas, M.F. & Baker, M.L. (2016), Tasmanian vascular plant census. A Census of the Vascular Plants of Tasmania, including Macquarie Island: 21 [nomenclatural synonym]

nomenclatural synonym of: Helminthotheca echioides (L.) Holub legitimate

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