Jepson eFlora: Taxon page
Vascular Plants of California
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Diplacus johnstonii
JOHNSTON'S MONKEYFLOWER


Higher Taxonomy
Family: PhrymaceaeView DescriptionDichotomous Key
Common Name: LOPSEED FAMILY
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.
Genus: DiplacusView DescriptionDichotomous Key


Common Name: MONKEYFLOWER
Habit: Annual to shrub, glabrous to hairy. Stem: generally erect. Leaf: generally +- sessile, generally toothed or entire. Inflorescence: raceme, bracted, flowers 1--4 per node. Flower: pedicel generally < calyx; occasionally cleistogamous; calyx generally green, lobes 5, generally << tube, generally unequal; corolla semi-persistent, shriveling on the developing capsule (deciduous, in D. mohavensis and D. pictus), white to red, maroon, purple, orange, or yellow, tube-throat floor generally with 2 longitudinal folds; anther sacs spreading; placentas 2, parietal; stigma lobes generally included. Fruit: generally ovoid to lanceolate in outline or nearly cylindric, dehiscent to near base along the upper suture, and at least in distal half along lower suture, or sometimes indehiscent, chambers 2. Seed: many, generally < 1 mm, ovoid, +- yellow to dark brown.
Species In Genus: 47 species: w United States, Mexico (Baja California). Etymology: (Greek: two cake, from the separated placentas in fruit at dehiscence) Note: Limb width measured between most distant points across corolla face.
eFlora Treatment 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]
Diplacus johnstonii (A.L. Grant) G.L. Nesom
NATIVE
Habit: Annual 3--20 cm, generally finely +- white-puberulent. Leaf: 7--30 mm, oblanceolate to obovate, tip generally acute. Flower: pedicel 1--5 mm; calyx 6--11 mm, membranous, +- red, minutely puberulent, mouth strongly oblique in fruit, lobes erect to spreading, unequal, 1--3 mm, +- acuminate; corolla magenta, lobes evenly spread, tube-throat 9--15 mm, throat floor yellow, mouth generally with 2 lateral, dark maroon patches; stigma +- exserted. Fruit: 7--12 mm. Chromosomes: 2n=16.
Ecology: Road banks, disturbed areas, especially scree; Elevation: generally 975--2920 m. Bioregional Distribution: SnGb, SnBr. Flowering Time: May--Aug Note: Intergrades with Diplacus constrictus in southern WTR and southern SCoRO.
Synonyms: Mimulus johnstonii A.L. Grant
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]
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Listed on CNPS Rare Plant Inventory

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Citation for this treatment: Naomi S. Fraga 2018, Diplacus johnstonii, in Jepson Flora Project (eds.) Jepson eFlora, Revision 6, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=99057, accessed on October 19, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on October 19, 2019.

Mimulus johnstonii
click for enlargement
© 2001 Steve Schoenig
Mimulus johnstonii
click for enlargement
© 2001 Steve Schoenig
Mimulus johnstonii
click for enlargement
© 2001 Steve Schoenig
Mimulus johnstonii
click for enlargement
© 2001 Steve Schoenig
Mimulus johnstonii
click for enlargement
© 2001 Steve Schoenig
Mimulus johnstonii
click for enlargement
© 2001 Steve Schoenig

More photos of Mimulus johnstonii in CalPhotos



Geographic subdivisions for Diplacus johnstonii:
SnGb, SnBr.
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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).





 

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Data provided by the participants of the  Consortium of California Herbaria.
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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.
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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.