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Plant Profile

Sonoma Ceanothus (Ceanothus sonomensis)

Photo Credit: Jake Ruygt

Global Rank: G2 - Imperiled
Legal Status: N/A
Family: Rhamnaceae
State: CA
Nature Serve ID: 129760
Lifeform: Shrub
Date Inducted in National Collection:

Description:

Ceanothus sonomensis, with the common name Sonoma ceanothus, is a rare species of shrub in the buckthorn family Rhamnaceae. This shrub can grow to five feet in length and has bluish-purple flowers from February though April. [CNPS: Calscape]

Where is Sonoma Ceanothus (Ceanothus sonomensis) located in the wild?

Habitat:

Ceanothus sonomensis is a member of the chaparral plant community in the California montane chaparral and woodlands sub-ecoregion and has an affinity towards serpentine soil. [CNPS]

Distribution:

Ceanothus sonomensis is endemic to northern California, where it is known only from the Hood Mountain Range. Most of its 10 or so occurrences are located mailnly in Sonoma County with a few plants in Lake and Napa Counties. [CNPS]

States & Provinces:

Sonoma Ceanothus can be found in California

Which CPC Partners conserve Sonoma Ceanothus (Ceanothus sonomensis)?

Santa Barbara Botanic Garden

Not Sponsored

Conservation Actions

Assigned 06/13/17

CPC's Plant Sponsorship Program provides long term stewardship of rare plants in our National Collection. We are so grateful for all our donors who have made the Plant Sponsorship Program so successful. We are in the process of acknowledging all our wonderful plant sponsorship donors on our website. This is a work in progress and will be updated regularly.

Conservation Actions

09/01/2020

Based on an September 2020 extract of the California Plant Rescue Database, Santa Barbara Botanic Garden holds 1 accessions of Ceanothus sonomensis in orthodox seed collection. There are as many as 50 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.

08/05/2020

Based on an August 2020 extract of the California Plant Rescue Database, Santa Barbara Botanic Garden has collected 1 seed accessions of Ceanothus sonomensis from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 10 maternal plants