Hill, J. (1769), Herbarium Brittanicum 1: 47 [comb. et stat. nov.]

basionym: Sonchus oleraceus var. asper L. legitimate

Sprengel, C.P.J. (1826), Systema Vegetabilium Edn. 17, 3: 649 [secondary reference]

Steetz, J. in Lehmann, J.G.C. (ed.) (1845), Compositae. Plantae Preissianae 1(3): 489 [secondary reference]

Mueller, F.J.H. von (20 October 1853), First general report of the Government Botanist on the vegetation of the colony. Victoria - Parliamentary Papers- Votes and Proceedings of the Legislative Assembly: 15 [secondary reference]

Hooker, J.D. (17 October 1856), The botany of the Antarctic voyage of H.M. Discovery ships Erebus and Terror. III. Flora Tasmaniae 1(3): 227 [secondary reference]

Bentham, G. (5 January 1867), Orders XLVIII. Myrtaceae- LXII. Compositae. Flora Australiensis 3: 679 [taxonomic synonym]

taxonomic synonym of: Sonchus oleraceus L. legitimate

Rodway, L. (1903), The Tasmanian Flora: 97 [secondary reference]

Hegi, G. in Hegi, G. (ed.) (1928), Illustrierte Flora von Mittel-Europa 6(2): 1110 [secondary reference]

Black, J.M. (1929), Bignoniaceae - Compositae. Flora of South Australia 4: 661 [secondary reference]

common name: Prickly Sow-thistle [n/a]

Domin, K. (1930), Beitrage zur Flora und Pflanzengeographie Australiens. Bibliotheca Botanica 22(89): 1243 [secondary reference]

nomenclatural synonym: Sonchus oleraceus var. asper L. legitimate taxonomic synonym: Sonchus fallax Wallr. legitimate

Black, J.M. & Robertson, E.L. (1957), Flora of South Australia Edn. 2, 4: 943 [secondary reference]

common name: Prickly Sow-thistle [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: Rough Sowthistle [n/a]

Curtis, W.M. (1963), Angiospermae: Lythraceae to Epacridaceae. The Student's Flora of Tasmania 2: 390 [secondary reference]

common name: Prickly Sow-Thistle [n/a]

Burbidge, N.T. & Gray, M. (1970), Flora of the Australian Capital Territory: 398 [secondary reference]

common name: Rough Sow-thistle [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: Rough Milk Thistle [n/a] common name: Rough Sowthistle [n/a] common name: Spiny Sowthistle [n/a] common name: Prickly Sowthistle [n/a]

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 86 [secondary reference]

Jessop, J.P. in Jessop, J.P. (ed.) (1981), Compositae (Asteraceae) - most genera. Flora of Central Australia: 414 [secondary reference]

common name: prickly sow-thistle [n/a] common name: Rough sow-thistle [n/a]

Green, J.W. (1985), Census of the Vascular Plants of Western Australia Edn. 2: 169 [secondary reference]

taxonomic synonym: Sonchus hydrophilus Boulos legitimate

Stanley, T.D. in Stanley, T.D. & Ross, E.M. (1986), Asteraceae. Flora of South-eastern Queensland 2: 596, Fig. 84E [secondary reference]

nomenclatural synonym: Sonchus oleraceus var. asper L. legitimate taxonomic synonym: Sonchus hydrophilus Boulos legitimate common name: Prickly Sowthistle [n/a] common name: Rough Sowthistle [n/a]

Dunlop, C.R. (1987), Checklist of the Vascular Plants of the Northern Territory. Technical Report: Conservation Commission of the Northern Territory 26: 12 [secondary reference]

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: 708 [secondary reference]

common name: Rough Sowthistle [n/a]

Jeanes, J.A. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Asteraceae. Flora of Victoria 4: 697-698 [secondary reference]

nomenclatural synonym: Sonchus oleraceus var. asper L. legitimate common name: Prickly Sow-thistle [n/a] common name: Rough Sow-thistle [n/a]

Wheeler, J.R., Marchant, N.G. & Lewington, M. (2002), Dicotyledons. Flora of the South West 2: 529 [secondary reference]

common name: Prickly Sowthistle [n/a] common name: Rough Sowthistle [n/a]

Thompson, I.R. (22 May 2007), A taxonomic treatment of tribe Lactuceae (Asteraceae) in Australia. Muelleria 25: 75-79 [secondary reference]

nomenclatural synonym: Sonchus oleraceus var. asper L. legitimate pro parte misapplication: Sonchus asper subsp. glaucescens (Jord.) Ball legitimate by Cooke, D.A. in Jessop, J.P. & Toelken, H.R. (ed.) (1986), Flora of South Australia Edn. 4, 3: 1654 pro parte misapplication: Sonchus asper subsp. glaucescens (Jord.) Ball legitimate by Jeanes, J.A. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Asteraceae. Flora of Victoria 4: 698, Fig. 132d

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

nomenclatural synonym: Sonchus oleraceus var. asper L. legitimate nomenclatural synonym: Sonchus asper (L.) Hill subsp. asper legitimate misapplication: Sonchus asper subsp. nymanii (Tineo & Guss.) Hegi legitimate by Boulos, L. in Eichler, Hj. (1965), Sonchus and Embergia. Supplement to J.M.Black's Flora of South Australia (Second Edition, 1943-1957): 331 misapplication: Sonchus asper subsp. glaucescens (Jord.) Ball legitimate by Cooke, D.A. in Jessop, J.P. & Toelken, H.R. (ed.) (1986), Flora of South Australia Edn. 4, 3: 1654 misapplication: Sonchus asper subsp. glaucescens (Jord.) Ball legitimate by Jeanes, J.A. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Asteraceae. Flora of Victoria 4: 698, Fig. 132d

• APC Comment: Treated as Sonchus asper subsp. glaucescens on LHI by P.S.Green, Fl. Australia 49: 373 (1994).
• APC Dist.: WA (naturalised), SA (naturalised), Qld (naturalised), NSW (naturalised), LHI (naturalised), ACT (naturalised), Vic (naturalised), Tas (naturalised)

Council of Heads of Australasian Herbaria (2014), Australian Plant Census: - [secondary reference]

nomenclatural synonym: Sonchus oleraceus var. asper L. legitimate nomenclatural synonym: Sonchus asper (L.) Hill subsp. asper legitimate isonym: Sonchus asper (L.) Vill. isonym misapplication: Sonchus asper subsp. nymanii (Tineo & Guss.) Hegi legitimate by Boulos, L. in Eichler, Hj. (1965), Sonchus and Embergia. Supplement to J.M.Black's Flora of South Australia (Second Edition, 1943-1957): 331 misapplication: Sonchus asper subsp. glaucescens (Jord.) Ball legitimate by Cooke, D.A. in Jessop, J.P. & Toelken, H.R. (ed.) (1986), Flora of South Australia Edn. 4, 3: 1654 misapplication: Sonchus asper subsp. glaucescens (Jord.) Ball legitimate by Jeanes, J.A. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Asteraceae. Flora of Victoria 4: 698, Fig. 132d

• APC Comment: Treated as Sonchus asper subsp. asper in WA, and as Sonchus asper subsp. glaucescens on LHI by P.S.Green, Fl. Australia 49: 373 (1994).
• APC Dist.: WA (naturalised), SA (naturalised), Qld (naturalised), NSW (naturalised), LHI (naturalised), ACT (naturalised), Vic (naturalised), Tas (naturalised)

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: 58 [secondary reference]

de Salas, M.F. & Baker, M.L. (2016), Tasmanian vascular plant census. A Census of the Vascular Plants of Tasmania, including Macquarie Island: 23 [secondary reference]

misapplication: Sonchus asper subsp. glaucescens (Jord.) Ball legitimate by Buchanan, A.M. in Buchanan, A.M. (ed.) (2005), A Census of the Vascular Plants of Tasmania Edn. 4: 13

Council of Heads of Australasian Herbaria (31 July 2018), Australian Plant Census: - APC [secondary reference]

nomenclatural synonym: Sonchus oleraceus var. asper L. legitimate nomenclatural synonym: Sonchus asper (L.) Hill subsp. asper legitimate isonym: Sonchus asper (L.) Vill. isonym misapplication: Sonchus asper subsp. nymanii (Tineo & Guss.) Hegi legitimate by Boulos, L. in Eichler, Hj. (1965), Sonchus and Embergia. Supplement to J.M.Black's Flora of South Australia (Second Edition, 1943-1957): 331 misapplication: Sonchus asper subsp. glaucescens (Jord.) Ball legitimate by Cooke, D.A. in Jessop, J.P. & Toelken, H.R. (ed.) (1986), Flora of South Australia Edn. 4, 3: 1654 misapplication: Sonchus asper subsp. glaucescens (Jord.) Ball legitimate by Jeanes, J.A. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Asteraceae. Flora of Victoria 4: 698, Fig. 132d misapplication: Sonchus asper subsp. glaucescens (Jord.) Ball legitimate by Buchanan, A.M. in Buchanan, A.M. (ed.) (2005), A Census of the Vascular Plants of Tasmania Edn. 4: 13

• APC Comment: Treated as Sonchus asper subsp. asper in WA, and as Sonchus asper subsp. glaucescens on LHI by P.S.Green, Fl. Australia 49: 373 (1994).
• APC Dist.: WA (naturalised), SA (naturalised), Qld (naturalised), NSW (naturalised), LHI (naturalised), ACT (naturalised), Vic (naturalised), Tas (naturalised)

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