Ceanothus crassifolius var. crassifolius
Hoary leaved ceanothus
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Family: Rhamnaceae · Type: Shrub · Native
Ceanothus crassifolius var. crassifolius (Hoary leaved ceanothus) is a native California shrub in the Rhamnaceae family, recognized by . Densely tomentose leaf undersides with rolled margins diagnostic versus var. planus.
Hoary leaved ceanothus is a California native shrub found in the Transverse and Peninsular Ranges in chaparral on ridges and slopes at elevations of 60 to 1,100 meters. Flowering from January to April, this plant produces small white to pale blue flowers in dense clusters that create a soft, cloud-like appearance. Growing with dense, compact branches 1 to 2 meters tall, it forms a robust and rounded shrub with a sturdy structure. Its leaves are distinctively covered in dense white tomentum on the underside, with slightly rolled margins and obscured veins, creating a soft, grayish-green appearance. When brushed against, the shrub releases a distinctive, herbal fragrance characteristic of California chaparral.
Identification and appearance
Key characters: 26 sympatric species. Densely tomentose leaf undersides with rolled margins diagnostic versus var. planus.
Habitat and range
Habitat: Ridges, slopes, chaparral
Elevation: 60-1100 m
California counties: San Diego, Ventura, Los Angeles, Orange, San Bernardino, Riverside
Outside California: northern Baja California
Bloom period
Ceanothus crassifolius var. crassifolius blooms Jan-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 crassifolius var. crassifolius native to California?
Yes. Ceanothus crassifolius var. crassifolius is native to California (recorded as native).
When does Ceanothus crassifolius var. crassifolius bloom?
Ceanothus crassifolius var. crassifolius blooms Jan-Apr.
Where in California does Ceanothus crassifolius var. crassifolius grow?
Ceanothus crassifolius var. crassifolius occurs in San Diego, Ventura, Los Angeles, Orange, San Bernardino, Riverside, at elevations of 60-1100 m.
What plant family does Ceanothus crassifolius var. crassifolius belong to?
Ceanothus crassifolius var. crassifolius is in the Rhamnaceae family, genus Ceanothus.
What habitat does Ceanothus crassifolius var. crassifolius grow in?
Ceanothus crassifolius var. crassifolius grows in Ridges, slopes, chaparral.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
Last updated 2026-04-09
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.