Chuang, T.I. & Heckard, L.R. (1991), Generic realignment and synopsis of subtribe Castillejinae (Scrophulariaceae - Tribe Pediculareae). Systematic Botany 16(4): 656 [comb. nov.]

basionym: Orthocarpus attenuatus A.Gray legitimate

• APC Dist.: Vic (naturalised)

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

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

nomenclatural synonym: Orthocarpus attenuatus A.Gray legitimate

• APC Dist.: Vic (naturalised)

---