Jepson eFlora: Taxon page
Vascular Plants of California
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Diplacus tricolor

Higher Taxonomy
Family: PhrymaceaeView DescriptionDichotomous Key

Habit: Annual to shrub. Stem: ×-section generally round. Leaf: opposite, simple, generally 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: +- 12 genera, 200 species: +- worldwide, many habitats; some cultivated as ornamental (e.g., Diplacus, Erythranthe). Formerly included in Scrophulariaceae. Note: Family description by David J. Keil.
eFlora Treatment Author: Naomi S. Fraga [TJM2 author David M. Thompson]
Scientific Editor: Bruce G. Baldwin.
Diplacus tricolor (Hartw. ex Lindl.) G.L. Nesom
Habit: Annual 1--14 cm, densely puberulent. Leaf: 8--45 mm, narrowly elliptic to oblanceolate, not ciliate. Inflorescence: flowers 1 per node. Flower: pedicel 1--3 mm; calyx 10--23 mm, puberulent, lobes unequal, 1--5 mm, obtuse; corolla magenta to purple with +- white throat with yellow folds, mottled with dark dots, lobe base with 1 large, maroon-purple spot, tube-throat 15--50 mm, puberulent externally. Fruit: 3--8 mm, oblique-ovoid, +- compressed laterally, hard, indehiscent. Chromosomes: 2n=18.
Ecology: Vernally wet depressions; Elevation: generally < 600 m (< 1500 m in MP). Bioregional Distribution: s NCoRO (s Sonoma Co.), NCoRI, e GV, sw MP; Distribution Outside California: Oregon. Flowering Time: Mar--Jun
Synonyms: Mimulus tricolor Hartw. ex Lindl.
Jepson eFlora Author: Naomi S. Fraga [TJM2 author David M. Thompson]
Reference: [Thompson 2005 Syst Bot Monogr 75:1--213; Barker et al. 2012 Phytoneuron 39:1--60]
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Diplacus traskiae
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Botanical illustration including Diplacus tricolor

botanical illustration including Diplacus tricolor

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Citation for this treatment: Naomi S. Fraga 2018, Diplacus tricolor, in Jepson Flora Project (eds.) Jepson eFlora, Revision 6,, accessed on October 03, 2023.

Citation for the whole project: Jepson Flora Project (eds.) 2023, Jepson eFlora,, accessed on October 03, 2023.

Diplacus tricolor
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© 2019 Barry Breckling
Diplacus tricolor
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© 2023 Barry Rice
Diplacus tricolor
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© 2022 Neal Kramer
Diplacus tricolor
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© 2018 Barry Rice
Diplacus tricolor
click for enlargement
© 2018 Barry Rice
Diplacus tricolor
click for enlargement
© 2018 Barry Rice

More photos of Diplacus tricolor in CalPhotos

Geographic subdivisions for Diplacus tricolor:
s NCoRO (s Sonoma Co.), NCoRI, e GV, sw MP
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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).


Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

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 (fruiting time in some monocot genera).