Ceanothus cuneatus var. ramulosus
Buck brush
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Family: Rhamnaceae · Type: Shrub · Native
Ceanothus cuneatus var. ramulosus (Buck brush) is a native California shrub in the Rhamnaceae family, recognized by . Dense growth form, round leaf tips, and blue flowers help separate from var. cuneatus.
Buck brush is a California native shrub found in southern Central Coast, San Francisco Bay Area, southern South Coast Ranges, and western Transverse Ranges in sandy and serpentine chaparral substrates at elevations below 700 meters. Flowering from February to May, this plant produces pale blue to lavender and occasionally white flowers. Growing as a dense, mound-like shrub to 1.5 meters tall with erect and spreading stems that arc gracefully, it features brown twigs. Its leaves are distinctively arranged two per node, with widely obovate blades 5 to 15 millimeters long and 3 to 12 millimeters wide, often with a truncate or notched tip and occasionally few sharp teeth near the leaf end. The shrub forms a compact, intricate silhouette characteristic of chaparral environments.
Identification and appearance
Key characters: 46 sympatric species. Dense growth form, round leaf tips, and blue flowers help separate from var. cuneatus.
Habitat and range
Habitat: Sandy substrates, serpentine, chaparral
Elevation: < 700 m
California counties: San Luis Obispo, Santa Barbara, Napa, Monterey, Marin, Sonoma, Santa Cruz, Santa Clara, Alameda, San Benito, Lake, Mendocino, Trinity, Solano, Contra Costa, Ventura, San Mateo
Bloom period
Ceanothus cuneatus var. ramulosus blooms Feb-May.
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 cuneatus var. ramulosus native to California?
Yes. Ceanothus cuneatus var. ramulosus is native to California (recorded as native).
When does Ceanothus cuneatus var. ramulosus bloom?
Ceanothus cuneatus var. ramulosus blooms Feb-May.
Where in California does Ceanothus cuneatus var. ramulosus grow?
Ceanothus cuneatus var. ramulosus occurs in San Luis Obispo, Santa Barbara, Napa, Monterey, Marin, Sonoma, Santa Cruz, Santa Clara and other counties, at elevations of < 700 m.
What plant family does Ceanothus cuneatus var. ramulosus belong to?
Ceanothus cuneatus var. ramulosus is in the Rhamnaceae family, genus Ceanothus.
What habitat does Ceanothus cuneatus var. ramulosus grow in?
Ceanothus cuneatus var. ramulosus grows in Sandy substrates, serpentine, chaparral.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
Last updated 2026-09-30
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.