Quercus wislizenii Interior Live Oak
Common Name Interior live oak, California live oak
Latin Name Quercus wislizenii
Family Fagaceae
Sunset zones / USDA zones 7-9,14-16,18-21 / 6-10
Type / Form Tree / Medium
Native Habitat 3,000 to 6,000 on dry slopes of Coastal Mountains
Soil Dry decomposed granite, clay loam with some organic content
Water Once per month depending on soil
Exposure Full sun
Height X Width 10 feet X 20 feet, maximum 75 feet
Protective Mechanism Holly-like leaves
Leaves Alternate, simple, evergreen, leathery, ovate to elliptical, 1 1/2 to 2 inches long, margin either entire or with sharply pointed teeth; leaf surface flat, shiny green above, yellow-green below.
Flowers Monoecious; males are slender, yellow-green catkins 2 to 3 inches long; females are very small, in clusters of 2 to 4 in leaf axils; both appear in early spring with the leaves. Acorn, 1 to 1 1/2 inches long, narrow, cone shaped with a pointed end; cap is scaly and covers approximately 1/3 to 1/2 of the nut; matures in 2 seasons.
Bark / Roots Young bark is smooth gray, green-brown; older stems become very dark rough and irregularly furrowed with scaly ridges. Twigs moderate, greenish brown, fuzzy when young; buds clustered orange-brown, broadly triangular and pointed.
Maintenance Low

Seed - it quickly loses viability if it is allowed to dry out. It can be stored moist and cool overwinter but is best sown as soon as it is ripe in an outdoor seed bed, though it must be protected from mice, squirrels etc. Small quantities of seed can be sown in deep pots in a cold frame. Plants produce a deep taproot and need to be planted out into their permanent positions as soon as possible, in fact seed sown in situ will produce the best trees[11]. Trees should not be left in a nursery bed for more than 2 growing seasons without being moved or they will transplant very badly.

Pests and diseases Resistant to Verticillium. Susceptible to Aphids, Beetle Borers, Beetle Grubs, Caterpillars, Coddling Moths, Insect Galls, Scales and White Fly, Sudden Oak Death, Crown Rot, Mistletoe, Oak Root Rot, Phytophthora, Powdery Mildew, Root Rot and Sooty Mold.
Landscaping uses Erosion control, windbreak, borders, low maintenance, fire retardant
Garden Suitability Mountain, Songbird, Thornless, Butterfly, Fire Retardant, Ethnobotanical
Ornamental Value Deep shade, evergreen
Nature Value Acorns eaten by squirrels and strong beaked birds, larval plant for butterflies and several species of wasps
Native American Uses Acorn ground for soup and flour for unleavened bread
    Images and data http://danr.ucop.edu/ihrmp/interior.html
    Images and data http://selectree.calpoly.edu/treedetail.lasso?-MaxRecords=50&-SkipRecords=0&-Op=bw&rid=1266
    Images and data http://www.sunnygardens.com/garden_plants/quercus/quercus_2061.php
    Images and data http://davesgarden.com/guides/pf/go/58113/
    Images and data http://en.wikipedia.org/wiki/Quercus_wislizenii
    Images and data http://www.theodorepayne.org/gallery/pages/Q/Quercus_wislizenii.htm
    Images and data http://www.desert-tropicals.com/Plants/Fagaceae/Quercus_wislizenii.html
    Images and data http://www.cnr.vt.edu/dendro/dendrology/syllabus2/factsheet.cfm?ID=556
    Images and data http://www.pfaf.org/database/plants.php?Quercus+wislizenii
    Data http://www.fs.fed.us/database/feis/plants/tree/quewis/all.html
    Distribution map http://www.efloras.org/object_page.aspx?object_id=6906&flora_id=1
    Distribution map http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233501098
    Nursery Oak Hills Nursery, 13874 Ranchero Road, Oak Hills, 92345, 760-947-6261
    Nursery, images, and data http://www.laspilitas.com/plants/564.htm
Note: Moderate pollinator