Taxon Details
Ceanothus roderickii
Pine Hill ceanothus
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Taxon Summary:
Ceanothus roderickii, commonly known as Pine Hill ceanothus, is a perennial evergreen shrub in the Rhamnaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 245 to 1090 meters. Ceanothus roderickii is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Ceanothus roderickii Knight |
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Common Name: Pine Hill ceanothus |
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| Family: | Rhamnaceae | |
| Element Code: | PDRHA04190 | |
| USDA Plants Symbol: | CERO4 | |
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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.1 |
| Fed List: | FE (1996-10-18) |
| State List: | CR (1982-07-01) |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | SB_CalBG/RSABG; SB_SBBG |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2021-10-04 |
| Lifeform: perennial evergreen shrub | ||||||||||||||
Blooming Period: Apr-Jun
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Elevation:
245 - 1090 meters 805 - 3575 feet |
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General Habitats:
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| Microhabitat Details: nutrient-deficient forms of gabbro-derived soils characterized by low concentrations of available K, P, S, Fe, and Zn | ||||||||||||||
Microhabitat:
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Notes: Threatened by residential development, road widening, vehicles, illegal dumping, and alteration of fire regimes. Possibly threatened by herbivores and non-native plants. See Four Seasons 2(4):23-24 (1968) for original description, Madroño 54(1): 13-21 (2007) for information on the effect of fire on the species, and Madroño 58(1):1-21 (2011) for information on the edaphic ecology and genetics on the species. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 9 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 6 | 67 % |
| THREAT LIST: | ||
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| Development | 6 | 66% |
| Road/trail construction/maint. | 4 | 44% |
| Erosion/runoff | 3 | 33% |
| Non-native plant impacts | 3 | 33% |
| ORV activity | 2 | 22% |
| Vandalism/dumping/litter | 2 | 22% |
| Wood cutting or brush clearing | 1 | 11% |
| Recreational use (non-ORV) | 1 | 11% |
| Improper burning regime | 1 | 11% |
| Total Occurrences: | 9 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 2 | 2 | 0 | 0 | 4 |
| Occurrence Status: | |||||
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| Historical >20 Years | 3 | ||||
| Recent <=20 Years | 6 | ||||
| Presence: | |||||
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| Presumed Extant | 9 | ||||
| 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) El Dorado (ELD) |
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Quads: Name (Quad Code) Clarksville (3812161), Pilot Hill (3812171), Shingle Springs (3812068) |
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Notes:
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Presumed Extant
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