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Taxon  Report  
Diplacus johnstonii  (A.L. Grant) G.L. Nesom
Johnston's monkeyflower
Diplacus johnstonii is an annual herb that is native to California, and endemic (limited) to California.
also called Mimulus johnstonii
California Rare Plant Rank: 4.3 (limited distribution).
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
Observation Search
~202 records in California
yellowone or more occurrences
within a 7.5-minute quadrangle
DJJJASONAFMM

Bloom Period
Genus: Diplacus
Family: Phrymaceae  
(Scrophulariaceae)
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Habitat: slopes

Communities: Yellow Pine Forest

Name Status:
Accepted by JEF + CNPS + POWO
Alternate Names:
JEF + CNPSMimulus johnstonii
Information about  Diplacus johnstonii from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

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ID Tips on PlantID.net

[wikipedia] Distribution, Habitat: Distribution It is endemic to the Transverse Ranges of southern California, where it is known only from the San Gabriel and San Bernardino Mountains. It grows in rocky and disturbed habitat, such as roadsides and scree. (link added by Mary Ann Machi)


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/12/2025).