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Taxon  Report  
Diplacus douglasii  (Benth.) G.L. Nesom
Purple mouse ears
Diplacus douglasii is an annual herb that is native to California, and also found elsewhere in western North America.
also called Mimulus douglasii
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

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

Wetlands: Occurs usually in wetlands, occasionally in non wetlands

Ultramafic affinity: 2.7 - strong indicator

Communities: Foothill Woodland, Chaparral, wetland-riparian

Name Status:
Accepted by JEF

Alternate Names:
JEFMimulus douglasii
Information about  Diplacus douglasii from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora


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[Wikipedia] Etymology, Adaptation to Serpentine Soils: Diplacus douglasii is a species of monkeyflower known by the common names brownies and purple mouse ears. It is native to the mountains and foothills of California and Oregon, where it is often found on serpentine soils.[1] D. douglasii was first described in a published flora by George Bentham,[1] an English botanist who was considered "the premier systematic botanist of the nineteenth century,.[2]" It was later described by Asa Gray, the father of North American botany. Growing on serpentine soils, it has adaptations to survive conditions most plants can't tolerate. Serpentine soils are known to be deficient in essential nutrients for plants. In addition to being low in essential plant nutrients such as nitrogen, calcium, phosphorus, potassium and sulfur, serpentine soils also have high levels of magnesium and heavy metals including nickel, cobalt and chromium, which are toxic to most plants.[12] (contributed 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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 04/24/2024).