Ventenat, E.P. (1804), Jardin de la Malmaison 1(7): 41, t. 41 [tax. nov.]

Barker, W.R. in Harden, G.J. (ed.) (1992), Scrophulariaceae. Flora of New South Wales 3: 572 [secondary reference]

Fischer, E. in Kubitzki, K. (ed.) (2004), Scrophulariaceae. The Families and Genera of Vascular Plants 7: 364 [secondary reference]

Mabberley, D.J. (1 May 2008), Mabberley's Plant-Book Edn. 3: 575 [secondary reference]

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

• APC Dist.: WA (naturalised), SA (naturalised), NSW (naturalised)

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