Ceanothus impressus

Ceanothus impressus is a species of shrub in the family Rhamnaceae known by the common name Santa Barbara ceanothus.[1][2] It is endemic to the Central Coast of California, where it is known from San Luis Obispo and Santa Barbara Counties.[3] It occurs in chaparral habitat.[1]

Ceanothus impressus
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Rhamnaceae
Genus: Ceanothus
Species:
C. impressus
Binomial name
Ceanothus impressus

This is an upright shrub with a dense or open form, reaching up to 3 meters in height. The evergreen leaves are about 2 centimeters long and oval shaped, highly ridged and wrinkled and curling under along the edges. They may be gland-dotted and have grayish hairy undersides. The shrub flowers abundantly in inflorescences of small blue flowers. The fruit is a crested spherical capsule about 4 millimeters wide.[3][4]

There are two varieties:[3]

  • C. impressus var. impressus – generally more compact with intricate branching and cupped leaves
  • C. impressus var. nipomensis (Nipomo ceanothus) – a rare variety, more open in shape, known only from a region of San Luis Obispo County
  • Ceanothus impressus
  • var. nipomensis
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References
  1. Ceanothus impressus. CalFlora.
  2. Ceanothus impressus. USDA PLANTS.
  3. Ceanothus impressus. Flora of North America.
  4. Ceanothus impressus. Jepson eFlora. Jepson Herbarium, University of California.


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