| Taxonomic Note: Various shrub
types along the Pacific coast from Curry Co. Oregon to Isla Cedros off the
coast of Baja California in Mexico, and also variants that extend inland
along the inner coast ranges of California, and along the Sierra Nevada of
California to the Sierra Juarez of Baja California, are treated in the
Jepson Manual (Hickman 1993) under a single species, Mimulus
aurantiacus. Other authorities have in the past recognized this
obvious polymorphic species to comprise 7–15 species, which have been
segregated into another genus, Diplacus. Flowers vary in
color— from red to yellow—and in size, while the plants also vary in habit
and in pubescence. Although putative hybrids or intermediates
between the various taxonomic entities have been viewed as justification
for treatment under a single species, it is also difficult to ignore
the gross differences that are encountered in the field, especially when
they appear correlated with different ecological environments
Therefore, more than one species in this complex is recognized
below. Differences are based on the keys provided in Abrams (Illus.
Fl. Pac. States, Vol. 3, 1951, Munz & Keck (Calif. Fl.,1959), and
Wiggins (Fl Baja Calif., 1981). The type for M. aurantiacus
was reportedly collected from near San Francisco or Monterrey.
A summary of the taxonomy with references is provided by Montalvo and
McMillan (Oct 2003) under the USDA Forest Service International Programs
website;
http://www.fs.fed.us/global/iitf/pdf/. A poster summary by
Tulig and Clark shows the geographical occurrences of the various taxa and
their intermediates or hybrids,
http://www.csupomona.edu/~jcclark/pdf/p2000aspt.pdf#search=%22Mimulus%20aurantiacus%20taxonomy%22
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Mimulus (Diplacus)
aurantiacus
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Mimulus longiflorus |
Mimulus longiflorus
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Mimulus (Diplacus) puniceus |
Mimulus (Diplacus)
puniceus
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Mimulus (Diplacus)
puniceus
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  Mimulus bigelovii |
Mimulus bigelovii
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Mimulus guttatus
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Mimulus primuloides
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Mimulus primuloides
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Phillips W. R, N. J. Baj, A. A. Gunatilaka and D. G. Kingston. 1996. C-geranyl compounds from Mimulus clevelandii. J. Nat. Prod. 59: 495–497. "Fractionation of the MeCOEt extract of Mimulus clevelandii yielded the novel 4-geranyl-5-hydroxy-2(3H)-benzofuranone (1) and the five known 6-geranylflavanones diplacone (2a), 3‘-O-methyldiplacone (2b), diplacol (2c), mimulone (2d), and 3‘-O-methyldiplacol (2e). 2D-NMR methods required revision of assignments for diplacone and diplacol and resolved the uncertainty in the site of methylation for the methyl ethers."
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