Hooker, J.D. in Hooker, J.D. (ed.) (1872), Botanical Magazine: t. 5983 [tax. nov.]

• Type: "... flowered in the Royal Gardens in June of the present year."

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 200 [secondary reference]

Green, J.W. (1985), Census of the Vascular Plants of Western Australia Edn. 2: 150 [secondary reference]

Stanley, T.D. in Stanley, T.D. & Ross, E.M. (1986), Scrophulariaceae. Flora of South-eastern Queensland 2: 444 [secondary reference]

Paczkowska, G. & Chapman, A.R. (2000), The Western Australian Flora, a descriptive catalogue: 532 [secondary reference]

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

• APC Dist.: WA (naturalised), Qld (doubtfully naturalised)

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