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Mimulus guttatus

Higher Taxonomy
Family: PhrymaceaeView Description 

Habit: Annual to shrub. Stem: ×-section generally round. Leaf: opposite, simple, entire or toothed; stipules 0. Inflorescence: spike, raceme, or panicle, bracted, or flowers 1--2 in axils. Flower: bisexual; calyx radial or +- bilateral, tube long, generally ribbed, lobes 5; corolla generally bilateral, generally 2-lipped, upper [1]2-lobed, lower 3-lobed; stamens 4 in 2 pairs, epipetalous, included or exserted; pistil 1, ovary superior, chambers 1--2, placentas parietal or axile, style 1, stigma lobes 2, flat, folding together when touched. Fruit: generally capsule, generally ellipsoid, loculicidal [indehiscent, 1-seeded].
Genera In Family: +- 15 genera, 230 species: +- worldwide, many habitats; some cultivated as ornamental (e.g., Mimulus, Mazus). Formerly included in Scrophulariaceae. Note: Family description by David J. Keil.
eFlora Treatment Author: David M. Thompson
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: MimulusView DescriptionDichotomous Key

Habit: Glabrous to hairy. Stem: generally erect. Leaf: opposite, generally +- sessile, generally toothed or entire, generally green or +- red. Inflorescence: raceme, bracted, or flowers generally 2 per axil. Flower: occasionally cleistogamous; calyx generally green, lobes 5, generally << tube, generally unequal; corolla generally deciduous, white to red, maroon, purple, gold, or yellow, lower lip base occasionally swollen, +- closing mouth, tube-throat floor generally with 2 longitudinal folds; anther sacs spreading; placentas 2, axile or parietal; stigma lobes generally flat, generally included. Fruit: generally ovoid to fusiform, generally upcurved if elongate, generally +- fragile, loculicidal near tip (hard, indehiscent), chambers 1--2. Seed: many, generally < 1 mm, ovoid, +- yellow to dark brown.
Species In Genus: +- 100 species: North America, Chile, eastern Asia, southern Africa, New Zealand, Australia. Etymology: (Latin: little mime or comic actor, from face-like corolla of some species) Note: Limb width measured between most distant points across corolla face.
Reference: Thompson 2005 Syst Bot Monogr 75:1--213

Mimulus guttatus DC.
Habit: Annual or rhizomed perennial herb, 2--150 cm, glabrous to hairy. Leaf: abruptly reduced upwards; petiole 0--95 mm; blade 4--125 mm, ovate to round, generally crenate, base generally irregularly small-lobed or dissected. Inflorescence: raceme, generally > 5-flowered; bracts ovate to cordate, fused at base or not, not glaucous. Flower: cleistogamous or open; pedicel 10--80 mm; calyx 6--30 mm, asymmetrically swollen in fruit, glabrous to hairy, lobes unequal, lowest 2 upcurved in fruit; corolla yellow, tube-throat 2--40 mm; placentas axile. Fruit: 5--12 mm. Chromosomes: 2n=28,30,32,48,56.
Ecology: Common. Wet places, generally terrestrial, occasionally emergent or floating in mats; Elevation: < 2500 m. Bioregional Distribution: CA; Distribution Outside California: to Alaska, western Canada, Rocky Mountains, northern Mexico; introduced in northeastern United States, eastern Can. Flowering Time: Mar--Aug Note: Complex: local populations possibly unique but forms readily intergrade.
Synonyms: Mimulus cupriphilus Macnair; Mimulus glabratus Kunth subsp. utahensis Pennell; Mimulus microphyllus Benth.; Mimulus guttatus subsp. arenicola Pennell; Mimulus guttatus subsp. arvensis (Greene) Munz; Mimulus guttatus subsp. litoralis Pennell; Mimulus guttatus subsp. micranthus (A. Heller) Munz; Mimulus guttatus var. cupriphilus (Macnair) D.W. Taylor; Mimulus guttatus var. pardalis (Pennell) D.W. Taylor; Mimulus guttatus var. platycalyx (Pennell) D.W. Taylor; Mimulus platycalyx Pennell; Mimulus nasutus Greene; Mimulus whipplei A.L. Grant;;
eFlora Treatment Author: David M. Thompson
Reference: Thompson 2005 Syst Bot Monogr 75:1--213
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botanical illustration including Mimulus guttatus


Citation for this treatment: David M. Thompson 2012, Mimulus guttatus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on August 21, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on August 21, 2018.

Mimulus guttatus
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© 2000 California Academy of Sciences
Mimulus guttatus
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© 2004 Carol W. Witham
Mimulus guttatus
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© 1999 Gary A. Monroe
Mimulus guttatus
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© 2001 Steve Schoenig
Mimulus guttatus
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© 2005 George W. Hartwell
Mimulus guttatus
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© 2001 George W. Hartwell

More photos of Mimulus guttatus in CalPhotos

Geographic subdivisions for Mimulus guttatus:
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.