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Photo Credits:
M. Ritter, W. Mark and J. Reimer
Photo Locations:
San Luis Obispo, CA, Los Gatos, CA, Visalia, CA, Rancho Santa Ana Botanic Garden - Claremont, CA, Los Angeles County Arboretum - Arcadia, CA and Albuquerque BioPark - Rio Grande Botanic Garden
VALLEY OAK
Quercus lobata
General Notes
A massive but graceful tree. Native to California.
A Quercus lobata in South of Covelo is registered as a California Big Tree. It measures 153 feet high, with a trunk circumference of 339 inches and a crown spread of 99 feet.
List all Fagaceae | Quercus
- Quercus lobata - Fagaceae
- Synonyms:
Common Names: Valley Oak, California White Oak - Native To: California
- Habit: Erect, Spreading or Weeping
and covers an Extensive Area.
Has Deciduous foliage. - Shape: Oval, Rounded or Umbrella
- Sunset Zones: 3 - 9 and 12 - 24
- USDA Hardiness Zones: 7 - 9
- Exposure: Full Sun to Partial Shade
- Water Needs: Moist to Dry Soil
- Soil Type: Loam or Sand
- Soil pH: Slightly Acidic to Highly Alkaline
- Salinity Tolerance: Moderate Inland
- Seaside Tolerance: Not Suited
- Height: 50 - 70 feet
- Canopy Width: 50 feet
- Growth Rate: 24 to 36 Inches per Season
- Landscape Use: Riparian
- Longevity: Greater than 150 years
- Leaves: Obovate and Lobed Medium to Dark Green. Bronze or Gold in Fall. Deciduous.
- Flowers: Inconspicuous. Flowers in Spring. Has separate male and female flowers on the same tree (monoecious).
- Fruit: Prolific, Brown Acorn, Medium (0.50 - 1.50 inches), fruiting in Fall or Winter.
- Bark: Dark Brown, Light Gray or Light Green, Blocky or Furrowed
- Pest & Disease: Resistant to Oak Root Fungus and Verticillium. Susceptible to Beetle Borers, Caterpillars, Insect Galls and Scales, Crown Rot, Mistletoe and Root Rot
- Shading Capacity: Rated as Moderate in Leaf and Moderate out of Leaf.
- Branch Strength: Rated as Medium to Medium Strong
- Litter Issue: Dry Fruit
- Root Damage Potential: Rated as Moderate
- Health Hazard: Allergy and Poisonous
- Biogenic Emissions: Moderate
- Fire Resistance: Favorable
Cite This Page:
SelecTree. "Quercus lobata Tree Record." 1995-2012. May 21, 2013.
< http://selectree.calpoly.edu/treedetail.lasso?rid=1246 >
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