Quercus kelloggii Quercus kelloggii
Quercus kelloggii Quercus kelloggii Quercus kelloggii
Common Name California Balck Oak
Latin Name Quercus kellogii
Family / Origin Fagaceae /
Sunset zones / USDA zones 5-7, 15-16, 18-21 / 5-10
Type / Form Tree / Large
Native Habitat Forest 0 to 7,000 feet
Soil Dry, decomposed granite, sand, clay loam, low to high organic content, well drained
Exposure Full or partial sun
Water None to once  per month depending on soil in hot weather
Height X Width 25 feet X 25 feet, maximum 80 feet X 80 feet
Protective Mechanism None
Leaves Green, lobed, winter deciduous
Flowers Monoecious; inconspicuous, male and female flowers borne in separate aments (catkins), appearing with the leaves
Bark / Roots Initially smooth and dark gray or black; when mature turning dark brown to black, broad, irregularly plated ridges, about 1 inch thick.  Twigs reddish brown, ridged, smooth or minutely pubescent; terminal buds are large, pointed and clustered at the ends of the twigs.
Maintenance None except that deciduous (Do not prune any oaks in spring)

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 Sudden oak death, oak leaf fungus, oak anthracnose, powdery mildew, leaf blister fungus, leaf rust, mistletoe
Landscape uses Erosion control, low maintenance, fire retardant
Garden Suitability Songbird, Mountain, Butterfly, Ethnobotanical, Fire Retardant
Nature Value Acorns eaten by squirrels and strong beaked birds, cover for nesting birds, larval plant for butterflies
Native American Uses Acorns ground to make soup and flour for unleavened bread
    Images and data http://www.cnr.vt.edu/DENDRO/dendrology/syllabus/factsheet.cfm?ID=242
    Images and data http://en.wikipedia.org/wiki/California_Black_Oak
    Images and data http://www.coestatepark.com/quercus_kelloggii.htm
    Images and data http://en.wikipedia.org/wiki/Quercus_kelloggii
    Images and data http://www.suddenoakdeath.org/pdf/Quercus%20kelloggii.pdf
    Images and data http://www.na.fs.fed.us/pubs/silvics_manual/volume_2/quercus/kelloggii.htm
    Images and data http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=7000
    Images and data http://davesgarden.com/guides/pf/go/81457/
    Nursery, images, and data http://www.laspilitas.com/plants/561.htm
    Nursery, images, and data http://www.cnplx.info/nplx/species?taxon=Quercus+kelloggii
    Nursery, images, and data Oak Hills Nursery, 13874 Ranchero Road, Oak Hills, 92345, 760-947-6261
    Data http://www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/quercus/kelloggii.htm
    Data http://www.desert-tropicals.com/Plants/Fagaceae/Quercus_kelloggii.html
    Data http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=233501052
    Distribution map http://esp.cr.usgs.gov/data/atlas/little/querkell.pdf
    Distribution map http://plants.usda.gov/java/profile?symbol=QUKE
Note: Moderate pollinator