Calflora Taxon Report
Dirca occidentalis  A. Gray
Western leatherwood
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2017 John Game
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2024 William Blaker
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2019 Dee Shea Himes
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2023 Cynthia Powell
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2024 Mike Russler
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2025 R.A. Chasey
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2021 Cynthia Powell
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2019 Dee Shea Himes
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2018 Hunter Breck
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2024 Kevin
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2023 Cynthia Powell
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2024 Mike Russler
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2024 Kevin
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2018 Miriam Sachs Martin
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2024 Kevin
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2019 Aaron Sunshine
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2015 Douglas Johnson
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2021 Jennifer Mathers
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2021 David Gallagher
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2018 David Greenberger
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2024 Mike Russler
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2024 Mike Russler
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2024 William Blaker
photo on Calflora
2024 William Blaker
photo on Calflora
2024 William Blaker
photo on Calflora
2024 William Blaker
photo on Calflora
2025 Mike Russler
photo on Calflora
2025 Mike Russler
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2025 Mike Russler
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2021 Cynthia Powell
Dirca occidentalis is a shrub that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
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
DJJJASONAFMM

Bloom Period
Genus: Dirca
Family: Thymelaeaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot
Wetlands: Equally likely to occur in wetlands and non wetlands

Habitat: riparian

Communities: North Coastal Coniferous Forest, Closed-cone Pine Forest, Mixed Evergreen Forest, Foothill Woodland, Chaparral, wetland-riparian

Name Status:
Accepted by JEF + CNPS + PLANTS + POWO
External links:

Bill Grave's Jasper Ridge Page: Dirca expert, Bill Grave's webpage at Jasper Ridge (link added by Roy West)

FOG BELT: Generally north or northeast facing slopes, generally in fog belt

Dirca occidentalis: Dirca occidentalis (western leatherwood) is a rare shrub that is native to California and endemic (limited) to California in the San Francisco Bay area. Its low growth, dispersal, and germination rates limit how quickly populations can recover from loss. Its very low seed dispersal rate may suggest that its natural disperser disappeared from the region.

Learn more about Dirca occidentalis: Dirca occidentalis Jepson video: (link added by Mary Ann Machi)

Suggested Citation
“Calflora - Taxon Report.” The Calflora Database, a non-profit organization. .

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