Taxon Report
Quercus parvula Greene var. tamalpaisensis S.K. LangerTamalpais oak |
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Taxon Summary
Quercus parvula var. tamalpaisensis, commonly known as Tamalpais oak, is a perennial evergreen shrub in the Fagaceae that is found only in California. It occurs within Lower montane coniferous forest, growing at elevations from 100 to 750 meters. Quercus parvula var. tamalpaisensis is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.Classification
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Scientific Name: |
Quercus parvula Greene var. tamalpaisensis S.K. Langer |
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Common Name: |
Tamalpais oak |
| Family: | Fagaceae |
| Element Code: | PDFAG051Q3 |
| USDA Plants Symbol: | QUPAT |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial evergreen shrub |
| Blooming Period: Mar-Apr | Mar-Apr |
| Elevation: | 100-750 (330-2460) |
| General Habitats: | Lower montane coniferous forest |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.3 |
| Global Rank: | G4T2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 20 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 2 |
| Fair (C) | 0 |
| Poor (D) | 1 |
| None (X) | 0 |
| Unknown (U) | 17 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Marin (MRN) | |
| Quads: Name (Quad Code) | |
| Bolinas (3712286), San Geronimo (3812216), San Rafael (3712285) | |
Threat List Data from the CNDDB
| Threat List Total: | 5 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 3 | 15 % | |
| Road/trail construction/maint. | 2 | 10% |
| Wood cutting or brush clearing | 1 | 5% |
| Foot traffic/trampling | 1 | 5% |
| Improper burning regime | 1 | 5% |
| Other | 1 | 5% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 10 May 2025].