Chuang, T.I. & Heckard, L.R. (1991), Generic realignment and synopsis of subtribe Castillejinae (Scrophulariaceae - Tribe Pediculareae). Systematic Botany 16(4): 657 [comb. nov.]

basionym: Orthocarpus exsertus A.Heller legitimate

Barker, W.R. in Walsh, N.G. & Entwisle, T.J. (ed.) (1999), Scrophulariaceae. Flora of Victoria 4: 486 [secondary reference]

taxonomic synonym: Orthocarpus purpurascens Benth. legitimate

Council of Heads of Australasian Herbaria (2010), Australian Plant Census: - APC [secondary reference]

nomenclatural synonym: Orthocarpus exsertus A.Heller legitimate taxonomic synonym: Orthocarpus purpurascens Benth. legitimate taxonomic synonym: Orthocarpus purpurascens var. pallidus Keck legitimate

• APC Dist.: Vic (formerly naturalised)

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