Pennell, F.W. (1921), Proceedings of the Academy of Natural Sciences of Philadelphia 73: 502 [autonym]

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

common name: Blue Toadflax [n/a]

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

nomenclatural synonym of: Nuttallanthus canadensis (L.) D.A.Sutton legitimate

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