Heenan, P.B.; de Lange, P.J.; Cameron, E.K.; Ogle, C.C.; Champion, P.D. 2004: Checklist of dicotyledons, gymnosperms, and pteridophytes naturalised or casual in New Zealand: additional records 2001–2003. New Zealand Journal of Botany 42: 797–814.
Shaw, J.M.H. 2018: Iochroma reshuffle. The Plantsman 17(2): 124–125.