Hegi, G. in Hegi, G. (ed.) (1928), Illustrierte Flora von Mittel-Europa 6(2): 1110 [comb. et stat. nov.]

basionym: Sonchus nymanii Tineo & Guss. legitimate

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]

taxonomic synonym: Sonchus glaucescens Jord. legitimate

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

misapplied to: Sonchus asper (L.) Hill 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

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

misapplied to: Sonchus asper (L.) Hill 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

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

misapplied to: Sonchus asper (L.) Hill 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

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