SelecTree: Tree Detail

INTERIOR LIVE OAK
Quercus wislizeni

Quercus wislizeni Quercus wislizeni Quercus wislizeni Quercus wislizeni Quercus wislizeni Quercus wislizeni Quercus wislizeni Quercus wislizeni Quercus wislizeni

Photo Locations: Swanton Pacific Ranch - Davenport, CA, LA County Arboretum - Arcadia, CA, San Luis Obispo, CA and Strybing Arboretum - San Francisco, CA

General Notes

Susceptible to oak moth.

Native to California.

A Quercus wislizeni in Humboldt is registered as a California Big Tree. It measures 88 feet high, with a trunk circumference of 254 inches and a crown spread of 82 feet.

Family: Fagaceae

Additional Common Names

INTERIOR LIVE OAK, SIERRA LIVE OAK

Tree Characteristics

Erect or Spreading and requires ample growing space.

Oval, Rounded, Umbrella or Vase Shape.

Has Evergreen foliage.

Height: 30 - 70 feet.

Width: 40 - 80 feet.

Growth Rate: 12 to 24 Inches per Year.

Longevity Greater than 150 years.

Leaves Lanceolate to Elliptic and Hollylike, Glossy Medium to Dark Green, No Change, Evergreen.

Flowers Inconspicuous. Flowers in Spring. Has separate male and female flowers on the same tree (monoecious).

Brown Acorn, Medium (0.50 - 1.50 inches), fruiting in Fall or Winter.

Bark Dark Brown, Furrowed, Ridged or Scaly.

Shading Capacity Rated as Dense in Leaf.

Litter Issue is Dry Fruit.

Tree Site Conditions & Constraints

Sunset Zones 7 - 9, 14 - 16 and 18 - 21.

USDA Hardiness Zones 8 - 10.

Exposure Full Sun to Partial Shade.

Moist to Dry Soil.

Clay, Loam or Sand Texture.

Highly Acidic to Slightly Alkaline Soil pH.

Seaside Tolerance is Not Suited.

Pests & Disease Information

Resistant to Verticillium. Susceptible to Caterpillars, Coddling Moths, Insect Galls and White Fly, Armillaria, Crown Rot, Mistletoe, Powdery Mildew and Root Rot.

Health, Safety & Environmental Concerns

Branch Strength Rated as Strong.

Root Damage Potential Rated as Moderate.

Allergy and Poisonous Health Hazard.

Biogenic Emissions considered High.

Desirable Wildlife Plant.

Attracts Birds and Squirrels.

Deer Palatable.

Cite this tree:
SelecTree. "Quercus wislizeni Tree Record." 1995-2018. Sep 21, 2018.
< https://selectree.calpoly.edu/tree-detail/quercus-wislizeni >

SelecTree Nursery Connection Map
Cal Poly / ESRI