Lindley, J. in Lindley, J. (ed.) (1834), Edwards's Botanical Register 20: t. 1696 [tax. nov.]

• Type: "A native of California, where its seeds were gathered by Mr. Douglas."

Tovey, J.R. & Morris, P.F. (1923), Contributions from the National Herbarium of Victoria, No. 3. Proceedings of the Royal Society of Victoria 35(2): 196 [secondary reference]

Curtis, W.M. (1967), Angiospermae: Plumbaginaceae to Salicaceae. The Student's Flora of Tasmania 3: 486 [secondary reference]

Jacobs, S.W.L. & Pickard, J. (1981), Plants of New South Wales: 135 [secondary reference]

Green, J.W. (1985), Census of the Vascular Plants of Western Australia Edn. 2: 143 [secondary reference]

• Text: Naturalised in WA

Rye, B.L. in Marchant, N.G., Wheeler, J.R., Rye, B.L., Bennett, E.M., Lander, N.S. & Macfarlane, T.D. (1987), Hydrophyllaceae. Flora of the Perth Region 1: 545 [secondary reference]

Hastings, S.M. in Harden, G.J. (ed.) (1992), Hydrophyllaceae. Flora of New South Wales 3: 386 [secondary reference]

Council of Heads of Australasian Herbaria (2006), Australian Plant Census: - APC [secondary reference]

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

de Salas, M.F. & Baker, M.L. (2016), Tasmanian vascular plant census. A Census of the Vascular Plants of Tasmania, including Macquarie Island: 52 [secondary reference]

---