Ball, J. (1877), Journal of the Linnean Society, Botany 16: 548 [autonym]

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

Boulos, L. in Eichler, Hj. (1965), Sonchus and Embergia. Supplement to J.M.Black's Flora of South Australia (Second Edition, 1943-1957): 331 [secondary reference]

Jeanes, J.A. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Asteraceae. Flora of Victoria 4: 698, Fig. 134c [secondary reference]

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

nomenclatural synonym of: Sonchus asper (L.) Hill legitimate

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

nomenclatural synonym of: Sonchus asper (L.) Hill legitimate

Thompson, I.R. in Wilson, A.J.G. (ed.) (2015), Sonchus. Flora of Australia 37: 119-121, Fig. 10J-K, map [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

Parker, C.M. & Percy-Bower, J.M. (31 March 2016), Updates to Western Australia’s vascular plant census for 2015. Nuytsia 27: 16 [secondary reference]

Council of Heads of Australasian Herbaria (31 July 2018), Australian Plant Census: - [nomenclatural synonym]

nomenclatural synonym of: Sonchus asper (L.) Hill legitimate

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