Heenan, P.B.; de Lange, P.J.; Cameron, E.K.; Parris, B.S. 2008: Checklist of dicotyledons, gymnosperms, and pteridophytes naturalised or casual in New Zealand: additional records 2004–06. New Zealand Journal of Botany 46: 257–283.
Humboldt, F.W.H.A.; Bonpland, A.J.A.; Kunth, K.S. 1818–1820 ("1818"): Nova Genera et Species Plantarum (quarto ed.) . Vol. 3.
Miers, J. 1848: Contributions to the botany of South America. London Journal of Botany 7: 17–26, 57–64, 333–369.
Scheidweiler, M.J.F. 1857: Iochroma, Schdw. Solaneae. Flore des Serres et des Jardins de l'Europe 12: 151–152.
Steele, R.; Lowe, M. 2002–2006: Index. Subtropicals Index: 1–12.
Wilcox, M.D. 1998: Some interesting plants in the Auckland University grounds. Auckland Botanical Society Journal 53(2): 58–62.