Taxon Details
Ceanothus divergens
Calistoga ceanothus
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Taxon Summary:
Ceanothus divergens, commonly known as Calistoga ceanothus, is a perennial evergreen shrub in the Rhamnaceae that is found only in California. It occurs within Chaparral (rocky, serpentinite, and volcanic), growing at elevations from 170 to 950 meters. Ceanothus divergens is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Ceanothus divergens Parry |
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Common Name: Calistoga ceanothus |
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| Family: | Rhamnaceae | |
| Element Code: | PDRHA04240 | |
| USDA Plants Symbol: | CEDI | |
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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: | BLM_S; SB_UCSC |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2024-11-05 |
| Lifeform: perennial evergreen shrub | ||||||||||||||
Blooming Period: Feb-Apr
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Elevation:
170 - 950 meters 560 - 3115 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: | 8 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 11 | 42 % |
| THREAT LIST: | ||
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| Improper burning regime | 3 | 11% |
| Agriculture | 3 | 11% |
| Development | 3 | 11% |
| Foot traffic/trampling | 2 | 7% |
| Other | 2 | 7% |
| Road/trail construction/maint. | 2 | 7% |
| Wood cutting or brush clearing | 1 | 3% |
| Erosion/runoff | 1 | 3% |
| Total Occurrences: | 26 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 2 | 5 | 3 | 2 | 0 | 14 |
| Occurrence Status: | |||||
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| Historical >20 Years | 16 | ||||
| Recent <=20 Years | 10 | ||||
| Presence: | |||||
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| Presumed Extant | 26 | ||||
| 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) Calistoga (3812255), Detert Reservoir (3812265), Kenwood (3812245), Mark West Springs (3812256), Mount St. Helena (3812266), Rutherford (3812244), Santa Rosa (3812246), St. Helena (3812254), The Geysers (3812277), Whispering Pines (3812276) |
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Notes:
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Presumed Extant
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