Erythranthe lutea (L.) G.L.Nesom (syn.: Mimulus luteus L.) (Chile) – An exceptional escape from cultivation. A small, possibly established population was recorded by a riverlet in 2012 in Waimes (Bütchenbach).
European plants mostly belong to Mimulus luteus var. rivularis Lindl. (syn.: M. nummularius (Clos) Stace) with blotched corolla lobes.
Hughes K.W. & Vickery R.K. Jr. (1974) Patterns of heterosis and crossing barriers resulting from increasing genetic distance between populations of the Mimulus luteus complex. J. Genet. 61: 235-245.