Taxon Report
Arctostaphylos pacifica RoofPacific manzanita |
 Aaron Schusteff |
Taxon Summary
Arctostaphylos pacifica, commonly known as Pacific manzanita, is a evergreen shrub in the Ericaceae that is found only in California. It occurs within Chaparral, and Coastal scrub, growing at elevations from 330 to 330 meters. Arctostaphylos pacifica is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Arctostaphylos pacifica Roof |
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Common Name: |
Pacific manzanita |
| Family: | Ericaceae |
| Element Code: | PDERI040Z0 |
| USDA Plants Symbol: | ARPA19 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | evergreen shrub |
| Blooming Period: Feb-Apr | Feb-Apr |
| Elevation: | 330-330 (1085-1085) |
| General Habitats: | Chaparral, Coastal scrub |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | None |
| Other Status: | SB_UCSC |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 1 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 0 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| San Mateo (SMT) | |
| Quads: Name (Quad Code) | |
| San Francisco South (3712264) | |
Threat List Data from the CNDDB
| Threat List Total: | 4 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 1 | 100 % | |
| Improper burning regime | 1 | 100% |
| Non-native plant impacts | 1 | 100% |
| ORV activity | 1 | 100% |
| Other | 1 | 100% |
Notes
| Known only from San Bruno Mountain in San Mateo County. Once considered a hybrid between A. glandulosa and A. uva-ursi. See A. uva-ursi in The Jepson Manual (1993). See Leaflets of Western Botany IX (13-14): 217 (1962) for original description. |
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Threats: |
| Potentially threatened by alteration of fire regimes and recreational activities. |
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Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 19 November 2025].