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Taxon  Report  
Quercus parvula  Greene  var. tamalpaisensis  S. K. Langer
Tamalpais oak
Quercus parvula var. tamalpaisensis is a shrub that is native to California.
California Rare Plant Rank: 1B.3 (rare, threatened, or endangered in CA and elsewhere).
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
Observation Search
~40 records in California
yellowone or more occurrences
within a 7.5-minute quadrangle
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Bloom Period
Parent: Quercus parvula
Genus: Quercus
Family: Fagaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Toxicity: Do not eat the fruit or leaf of this plant.
Name Status:
Accepted by JEF + CNPS + PLANTS + POWO
Information about  Quercus parvula var. tamalpaisensis from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

USDA PLANTS Profile (QUPAT)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net

[www.wildflower.org] Characteristics, Description, Habitat: Plant Characteristics Duration: Perennial Habit: Shrub Leaf Retention: Evergreen Fruit Type: Nut Size Notes: Up to about 10 feet tall. Fruit: Acorns biennial, narrowly conic or ovoid to narrowly oblong. Cup deeply and narrowly cup-shaped or U-shaped, enclosing one third to two thirds nut. Bloom Information Bloom Color: Green , Brown Bloom Time: Mar , Apr Distribution USA: CA Native Habitat: Valleys, slopes, sand chaparral. (link added by Mary Ann Machi)


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 07/19/2025).