Ceanothus jepsonii
Musk brush, Musk Brush
(c) Ken-ichi Ueda, some rights reserved (CC BY) · licence
Family: Rhamnaceae · Type: Shrub · Native
Ceanothus jepsonii (Musk brush) is a native California shrub in the Rhamnaceae family, recognized by opposite leaves and 6-8 floral parts are highly distinctive.
Musk brush is a California native shrub found in the Klamath Ranges, northern Coast Ranges, and San Francisco Bay Area on rocky, serpentine slopes at elevations of 36 to 1,740 meters. Flowering from March to April, this plant produces blue to white flowers in compact umbel-like clusters 1 to 2.5 centimeters long. Growing with ascending to erect stems less than 1.5 meters tall, it features intricately branched twigs that are generally brown. Its opposite, evergreen leaves are distinctive, with ovate to elliptic blades 10 to 20 millimeters long, folded lengthwise, yellow-green on top, and featuring 7 to 11 spine-like teeth along the wavy margins. The fruit is a wrinkled, 3-ridged structure 5 to 7 millimeters wide, with short horns 1 to 3 millimeters long.
Identification and appearance
Key characters: 41 sympatric species; opposite leaves and 6-8 floral parts are highly distinctive
Habitat and range
Habitat: Rocky, serpentine slopes
Elevation: 36-1740 m
California counties: Sonoma, Mendocino, Marin, Napa, Butte, Solano, Los Angeles, Lake, Tehama, Colusa, Trinity, Plumas, Siskiyou, San Benito
Bloom period
Ceanothus jepsonii blooms Mar-Apr.
How to tell it apart
vs Rhamnus: Ceanothus has showy blue/white/pink flowers in dense clusters; Rhamnus has tiny inconspicuous greenish flowers.; vs Quercus: Ceanothus has showy flower clusters and small leaves; Quercus has acorns and distinctive lobed or toothed oak leaves.; vs Baccharis: Ceanothus has individual flowers with 5 separate petals; Baccharis has composite flower heads with tiny disc flowers.; vs Cercocarpus: Ceanothus has blue/white/pink flowers in clusters; Cercocarpus has tiny flowers with no petals and feathery fruiting tails.; vs Adenostoma: Ceanothus flowers have 5 distinct colored petals; Adenostoma has tiny white flowers and needle-like clustered leaves.
Frequently asked questions
Is Ceanothus jepsonii native to California?
Yes. Ceanothus jepsonii is native to California (recorded as native).
When does Ceanothus jepsonii bloom?
Ceanothus jepsonii blooms Mar-Apr.
Where in California does Ceanothus jepsonii grow?
Ceanothus jepsonii occurs in Sonoma, Mendocino, Marin, Napa, Butte, Solano, Los Angeles, Lake and other counties, at elevations of 36-1740 m.
What plant family does Ceanothus jepsonii belong to?
Ceanothus jepsonii is in the Rhamnaceae family, genus Ceanothus.
What habitat does Ceanothus jepsonii grow in?
Ceanothus jepsonii grows in Rocky, serpentine slopes.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.