Ceanothus dentatus
Dwarf ceanothus
(c) Henrik Kibak, some rights reserved (CC BY), uploaded by Henrik Kibak · licence
Family: Rhamnaceae · Type: Shrub · Native
Ceanothus dentatus (Dwarf ceanothus) is a native California shrub in the Rhamnaceae family, recognized by . Rolled leaf margins, dense undersurface hairs, and coastal habitat diagnostic.
Dwarf ceanothus is a California native shrub found in the Central Coast, Santa Cruz Mountains, and northern South Coast Ranges in sandy coastal bluffs and slopes at elevations of 5 to 1,500 meters. Flowering from March to June, this plant produces deep blue flowers in small raceme-like clusters about 1.5 to 3 centimeters long. Growing as a dense shrub 0.5 to 1.5 meters tall with ascending to erect stems and flexible brown to gray-brown twigs, it forms a compact and intricate shape. Its alternate evergreen leaves are elliptic to oblong-oblanceolate, dark green on top, pale green underneath, with a distinctive rolled margin and measuring 4 to 16 millimeters long and 2 to 8 millimeters wide. The fruit is three-ridged and 2.5 to 4 millimeters wide, with a truncate to notched leaf tip.
Identification and appearance
Key characters: 39 sympatric species. Rolled leaf margins, dense undersurface hairs, and coastal habitat diagnostic.
Habitat and range
Habitat: Sandy substrates, coastal bluffs, slopes
Elevation: 5-1500 m
California counties: Monterey, San Luis Obispo, Santa Cruz, Napa, Ventura, San Francisco, Santa Clara, Marin, Alameda, Mendocino
Bloom period
Ceanothus dentatus blooms Mar-Jun.
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 dentatus native to California?
Yes. Ceanothus dentatus is native to California (recorded as native).
When does Ceanothus dentatus bloom?
Ceanothus dentatus blooms Mar-Jun.
Where in California does Ceanothus dentatus grow?
Ceanothus dentatus occurs in Monterey, San Luis Obispo, Santa Cruz, Napa, Ventura, San Francisco, Santa Clara, Marin and other counties, at elevations of 5-1500 m.
What plant family does Ceanothus dentatus belong to?
Ceanothus dentatus is in the Rhamnaceae family, genus Ceanothus.
What habitat does Ceanothus dentatus grow in?
Ceanothus dentatus grows in Sandy substrates, coastal bluffs, 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.