Ceanothus oliganthus

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Ceanothus oliganthus
Ceanothus sorediatus 2.jpg
var. sorediatus
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Rosales
Family: Rhamnaceae
Genus: Ceanothus
Species: C. oliganthus
Binomial name
Ceanothus oliganthus

Ceanothus divaricatus
Ceanothus hirsutus
Ceanothus orcuttii

Ceanothus oliganthus is a species of shrub in the buckthorn family Rhamnaceae known by the common name hairy ceanothus,[1] or hairy-leaf ceanothus.[2]

The variety of this species known as jimbrush (var. sorediatus) is sometimes treated as a separate species.[3]

Habitat and range[edit]

It is endemic to California, where it can be found in most[citation needed] of the coastal mountain ranges in dry habitat such as chaparral.

It is found in the Santa Monica Mountains of California.[2]


This is a large, erect shrub approaching 3 meters in maximum height.[citation needed]

Leaves and stems[edit]

The stipules (small leaf-like structures on the stems at the base of the leaf stem, are thin and fall off early.[2]

The evergreen leaves are alternately arranged and may be up to 4 centimeters long.[citation needed] They are dark green on top, paler and hairy on the underside,[citation needed] and are edged with glandular teeth.[citation needed] Leaves have 3 main veins rising from the base.[2] Leaves have a toothed edge.[2] The leaf is covered with short, soft hairs on the top.

Branchlets are flexible, not stiff.[2]

Inflorescense and fruit[edit]

The inflorescence is a cluster or series of clusters of blue or purple flowers.

The fruit is a capsule which may be hairy or not, depending on variety.

The fruit is not horned.[2]

It blooms April to May.[2]

See also[edit]


  1. ^ "Ceanothus oliganthus". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 6 June 2016. 
  2. ^ a b c d e f g h Flowering Plants of the Santa Monica Mountains, Nancy Dale, 2nd Ed., 2000, p. 167
  3. ^ USDA Plants Profile: var. sorediatus

External links[edit]