Taxon Details
Dirca occidentalis
western leatherwood
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© 2017 Steve Matson |
© 2004 David A. Tharp |
© 2015 Neal Kramer |
Taxon Summary:
Dirca occidentalis, commonly known as western leatherwood, is a perennial deciduous shrub in the Thymelaeaceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, Cismontane woodland, Closed-cone coniferous forest, North Coast coniferous forest, Riparian forest, and Riparian woodland, growing at elevations from 25 to 425 meters. Dirca occidentalis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Dirca occidentalis Gray |
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Common Name: western leatherwood |
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| Family: | Thymelaeaceae | |
| Element Code: | PDTHY03010 | |
| USDA Plants Symbol: | DIOC3 | |
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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_CalBG/RSABG |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2022-06-08 |
| Lifeform: perennial deciduous shrub | ||||||||||||||
Blooming Period: Jan-Mar(Apr)
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Elevation:
25 - 425 meters 80 - 1395 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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| Threat List Total: | 13 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 34 | 37 % |
| THREAT LIST: | ||
|---|---|---|
| Road/trail construction/maint. | 22 | 24% |
| Other | 13 | 14% |
| Non-native plant impacts | 11 | 12% |
| Foot traffic/trampling | 7 | 7% |
| Development | 5 | 5% |
| Wood cutting or brush clearing | 5 | 5% |
| Recreational use (non-ORV) | 2 | 2% |
| Grazing | 2 | 2% |
| Insufficient population/stand size | 1 | 1% |
| Logging | 1 | 1% |
| Erosion/runoff | 1 | 1% |
| Vandalism/dumping/litter | 1 | 1% |
| Waterway bank protection/maintenance | 1 | 1% |
| Total Occurrences: | 91 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 10 | 26 | 9 | 2 | 0 | 44 |
| Occurrence Status: | |||||
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| Historical >20 Years | 22 | ||||
| Recent <=20 Years | 69 | ||||
| Presence: | |||||
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| Presumed Extant | 91 | ||||
| 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) Alameda (ALA), Contra Costa (CCA), Marin (MRN), San Mateo (SMT), Santa Clara (SCL), Sonoma (SON) |
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Quads: Name (Quad Code) Benicia (3812212), Bodega Head (3812331), Bolinas (3712286), Briones Valley (3712282), Cupertino (3712231), Inverness (3812217), La Honda (3712233), Los Gatos (3712128), Mindego Hill (3712232), Montara Mountain (3712254), Oakland East (3712272), Palo Alto (3712242), Richmond (3712283), San Geronimo (3812216), San Mateo (3712253), San Rafael (3712285), Valley Ford (3812238), Woodside (3712243) |
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Notes:
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Presumed Extant
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