Diplacus is a plant genus in the family Phrymaceae, which was traditionally placed in family Scrophulariaceae. In the 2012 restructuring of Mimulus by Barker, et al., based largely upon DNA evidence, seven species were left in Mimulus, 111 placed into Erythranthe (species with axile placentation and long pedicels), 46 placed into Diplacus (species with parietal placentation and sessile flowers), two placed in Uvedalia, and one each placed in Elacholoma, Mimetanthe, and Thyridia. Diplacus used to be a separate genus from Mimulus, but it was merged into Mimulus no later than 1905, until the 2012 restructuring. Dry and rocky areas are preferred.
Species
Species include: Diplacus angustatus (A.Gray) G.L.Nesom Diplacus aridus Abrams Diplacus aurantiacus (Curtis) Jeps. Diplacus × australis (McMinn ex Munz) Tulig Diplacus bigelovii (A.Gray) G.L.Nesom Diplacus bolanderi (A.Gray) G.L.Nesom Diplacus brandegeei (Pennell) G.L.Nesom Diplacus brevipes (Benth.) G.L.Nesom Diplacus calycinus Eastw. Diplacus clevelandii (Brandegee) Greene Diplacus clivicola (Greenm.) G.L.Nesom Diplacus compactus (D.M.Thomps.) G.L.Nesom Diplacus congdonii (B.L.Rob.) G.L.Nesom Diplacus constrictus (A.L.Grant) G.L.Nesom Diplacus cusickii (Greene) G.L.Nesom Diplacus douglasii (Benth.) G.L.Nesom Diplacus fremontii (Benth.) G.L.Nesom Diplacus grandiflorus Groenl. Diplacus jepsonii (A.L.Grant) G.L.Nesom Diplacus johnstonii (A.L.Grant) G.L.Nesom Diplacus kelloggii (Curran ex Greene) G.L.Nesom Diplacus latifolius Nutt. Diplacus layneae (Greene) G.L.Nesom Diplacus leptaleus (A.Gray) G.L.Nesom Diplacus linearis (Benth.) Greene Diplacus × lompocensis McMinn Diplacus longiflorus Nutt. Diplacus mephiticus (Greene) G.L.Nesom Diplacus mohavensis (Lemmon) G.L.Nesom Diplacus nanus (Hook. & Arn.) G.L.Nesom Diplacus ovatus (A.Gray) G.L.Nesom Diplacus parryi (A.Gray) G.L.Nesom & N.S.Fraga Diplacus parviflorus Greene Diplacus pictus (Curran ex Greene) G.L.Nesom Diplacus pulchellus (Drew ex Greene) G.L.Nesom Diplacus puniceus Nutt. Diplacus pygmaeus (A.L.Grant) G.L.Nesom Diplacus rattanii (A.Gray) G.L.Nesom Diplacus rupicola (Coville & A.L.Grant) G.L.Nesom & N.S.Fraga Diplacus rutilis (A.L.Grant) McMinn Diplacus stellatus Kellogg Diplacus torreyi (A.Gray) G.L.Nesom Diplacus traskiae (A.L.Grant) G.L.Nesom Diplacus tricolor (Hartw. ex Lindl.) G.L.Nesom Diplacus vandenbergensis (D.M.Thomps.) G.L.Nesom Diplacus viscidus (Congdon) G.L.Nesom Diplacus whitneyi (A.Gray) G.L.Nesom