Ceanothus perplexans
Cupped leaf ceanothus
Photo by Chez Brungraber
Family: Rhamnaceae · Type: Shrub · Native
Ceanothus perplexans (Cupped leaf ceanothus) is a native California shrub in the Rhamnaceae family, recognized by key diagnostic feature is cupped leaf shape.
Cupped leaf ceanothus is a California native shrub found in eastern Transverse Ranges and Peninsular Ranges in chaparral and open conifer forest at elevations of 305 to 2,100 meters. Flowering from March to May, this plant produces white to pale blue flowers in compact umbel-like clusters about 1 to 1.5 centimeters long. Growing to less than 3 meters tall with ascending to erect stems that are gray-brown to light gray and densely hairy when young, it forms an open, occasionally intricately branched structure. Its distinctive evergreen leaves are widely elliptic to nearly round, 10 to 20 millimeters long, with a concave upper surface and 7 to 11 sharp marginal teeth. The compact shrub bears smooth fruits 3 to 5 millimeters wide, often with subtle bulges near the tip.
Identification and appearance
Key characters: 26 sympatric species; key diagnostic feature is cupped leaf shape
Habitat and range
Habitat: Slopes, flats, chaparral, open conifer forest
Elevation: 305-2100 m
California counties: San Diego, San Bernardino, Riverside, Los Angeles, Ventura, Imperial, Tulare, Alameda, Inyo
Outside California: northern Baja California, including Guadalupe Island
Bloom period
Ceanothus perplexans blooms Mar-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 perplexans native to California?
Yes. Ceanothus perplexans is native to California (recorded as native).
When does Ceanothus perplexans bloom?
Ceanothus perplexans blooms Mar-May.
Where in California does Ceanothus perplexans grow?
Ceanothus perplexans occurs in San Diego, San Bernardino, Riverside, Los Angeles, Ventura, Imperial, Tulare, Alameda and other counties, at elevations of 305-2100 m.
What plant family does Ceanothus perplexans belong to?
Ceanothus perplexans is in the Rhamnaceae family, genus Ceanothus.
What habitat does Ceanothus perplexans grow in?
Ceanothus perplexans grows in Slopes, flats, chaparral, open conifer forest.
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.