Taxon Details
Ceanothus sonomensis
Sonoma ceanothus
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Taxon Summary:
Ceanothus sonomensis, commonly known as Sonoma ceanothus, is a perennial evergreen shrub in the Rhamnaceae that is found only in California. It occurs within Chaparral (sandy, serpentinite, and volcanic), growing at elevations from 215 to 800 meters. Ceanothus sonomensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Ceanothus sonomensis J.T. Howell |
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Common Name: Sonoma ceanothus |
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| Family: | Rhamnaceae | |
| Element Code: | PDRHA04420 | |
| USDA Plants Symbol: | CESO | |
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G2 |
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State Rank: |
S2 |
| Other Status: | SB_SBBG |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2021-05-26 |
| Lifeform: perennial evergreen shrub | ||||||||||||||
Blooming Period: Feb-Apr
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Elevation:
215 - 800 meters 705 - 2625 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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| Threat List Total: | 4 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 3 | 10 % |
| THREAT LIST: | ||
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| Improper burning regime | 2 | 6% |
| Other | 1 | 3% |
| Road/trail construction/maint. | 1 | 3% |
| Development | 1 | 3% |
| Total Occurrences: | 30 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 3 | 1 | 0 | 1 | 0 | 25 |
| Occurrence Status: | |||||
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| Historical >20 Years | 25 | ||||
| Recent <=20 Years | 5 | ||||
| Presence: | |||||
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| Presumed Extant | 30 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Lake (LAK), Napa (NAP), Sonoma (SON) |
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Quads: Name (Quad Code) Aetna Springs (3812264), Calistoga (3812255), Chiles Valley (3812253), Detert Reservoir (3812265), Glen Ellen (3812235), Kenwood (3812245), Rutherford (3812244), Santa Rosa (3812246), Sonoma (3812234), St. Helena (3812254), Walter Springs (3812263) |
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Notes:
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Presumed Extant
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