Nesom, G.L. 2013. Three new species of Diplacus (Phrymaceae) from California and Oregon. Phytoneuron 2013-65: 1–18.
Taxonomic Comments
According to Nesom (2013), Diplacus cusickii is a much narrower taxon than Mimulus cusickii; most of the plants previously considered M. cusickii are described by Nesom as Diplacus cusickioides.
Flora of North America Editorial Committee (FNA). 2019. Flora of North America north of Mexico. Vol. 17: Magnoliophyta: Tetrachondraceae to Orobanchaceae. Oxford Univ. Press, New York. xxiv + 737 pp.
Nesom, G.L. 2013. Three new species of <i>Diplacus </i>(Phrymaceae) from California and Oregon. Phytoneuron 2013-65: 1–18.