Murray, L. in Harden, G.J. (ed.) (1992), Centaurea. Flora of New South Wales 3: 326 [primary reference]

misapplication: Centaurea isnardii L. legitimate by Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 75

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

doubtful taxonomic synonym of: Centaurea aspera L. legitimate

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

doubtful taxonomic synonym of: Centaurea aspera L. legitimate

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