SelecTree: Tree Detail
Photo Locations: Los Angeles County Arboretum - Arcadia, CA
General NotesThis live oak, typically grows in dry hills at moderate altitudes. In the red oak group, retains its leaves through the winter until the new leaves are produced in spring. An important food for squirrels, birds and other wildlife. The tree is named after the United States army surveyor, Lieutenant William Hemsley Emory, who surveyed the area of west Texas where it was discovered in 1846.
Native to Southwestern United States and Northern Mexico.
Erect or Spreading and requires ample growing space.
Oval, Rounded or Umbrella Shape.
Has Evergreen to Partly Deciduous foliage.
Height: 30 - 60 feet.
Growth Rate: 24 Inches per Year.
Longevity Greater than 150 years.
Leaves Lanceolate to Oblong, Dark Green, No Change, Evergreen to Partly Deciduous.
Flowers Inconspicuous. Flowers in Spring. Has separate male and female flowers on the same tree (monoecious).
Black or Brown Acorn, Medium (0.50 - 1.50 inches), fruiting in Fall or Winter.
Bark Dark Brown or Dark Gray, Fissured.
Shading Capacity Rated as Moderate in Leaf.
Litter Issue is Dry Fruit.
Tree Site Conditions & Constraints
Sunset Zones 10 - 13.
USDA Hardiness Zones 9.
Exposure Full Sun to Partial Shade.
Moist to Dry Soil.
Clay, Loam or Sand Texture.
Highly Acidic to Highly Alkaline Soil pH.
Seaside Tolerance is Not Suited.
Pests & Disease Information
Resistant to Verticillium. Susceptible to Armillaria and Root Rot.
Health, Safety & Environmental Concerns
Branch Strength Rated as Strong.
Root Damage Potential Rated as Moderate.
Allergy and Poisonous Health Hazard.
Desirable Wildlife Plant.
Attracts Birds and Squirrels.
Cite this tree:
SelecTree. "Quercus emoryi Tree Record." 1995-2018. Sep 21, 2018.
< https://selectree.calpoly.edu/tree-detail/quercus-emoryi >