Dirca occidentalis, or western leatherwood, is a deciduous shrub with leaves three to seven centimeters in length. Yellow flowers emerge prior to leafing. It grows on moist and shaded slopes. It is rare and endemic to the San Francisco Bay area of California. Its closest relative, Dirca palustris, lives in the Eastern half of North America.
- USDA Plants database Dirca occidentalis A. Gray
- Jepson Manual Online Dirca occidentalis A. Gray
- Calflora Dirca occidentalis A. Gray
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