Quercus gambelii - Bark - Gambel oak
Quercus gambelii - Flower - Gambel oak Quercus gambelii Quercus gambelii
Common Name Gambel oak, Scrub oak
Latin Name Quercus gambelii
Family Fagaceae
Sunset zones / USDA zones 1-3, 10 / 4-7
Type / Form Tree / Medium
Native Habitat Southern Rocky Mountains above 6,000 feet
Soil Dry, decomposed granite, sand, clay loam low in organic content, well drained
Water Twice per month during dry periods
Exposure Full sun to light shade
Height X Width Slowly to 20 to 30 feet
Protective Mechanism None
Leaves Alternate, simple, deciduous. Pinnately lobed with 5-9 moderate-to-deep rounded lobes; 3 to 6 inches long and 2 to 3 inches wide; usually widest above the midpoint; leathery texture. Yellow-green and smooth above; paler and smooth to densely hairy below.
Flowers Monoecious; but with separate male and female catkins produced on current year's twigs. Male catkins about 1 inch long; female catkins tiny and in small clusters borne in the leaf axils. Single or clumped acorns about 1 inch long; rounded with a shallow cap covering 1/4 to 1/3 of the nut; mature in one season.
Bark / Roots Young bark is thin and light colored, turning darker and rougher with age. Young twigs are stout, reddish brown, and slightly hairy; older twigs are darker and smoother; terminal buds are clustered and have distinct overlapping scales.
Maintenance Low but prune out dead growth, nut do not prune in spring
Propagation Seeds
Pests and diseases Galls, leafrollers, cankerworms, anthracnose, perennial canker, leaf blister, powdery mldew, root rot, heart rot,
Landscape uses Mountain, Songbird, Ethnobotanical, Thornless, Butterfly
Garden Suitability Background, barrier, erosion control, low maintenance
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
Links  
    Images and data http://en.wikipedia.org/wiki/Quercus_gambelii
    Images and data http://extension.usu.edu/files/publications/publication/HG-514.pdf
    Images and data http://extension.usu.edu/range/woody/gambeloak.htm
    Images and data http://www.ext.colostate.edu/pubs/natres/06311.html
    Images and data http://www.treenm.com/education/gambleoak.shtml
    Images and data http://www.cnr.vt.edu/dendro/dendrology/syllabus/factsheet.cfm?ID=315
    Images and data http://www.naturesongs.com/vvplants/gambeloak.html
    Images and data http://westernexplorers.us/GambelOak.html
    Images and data http://www.cas.vanderbilt.edu/bioimages/species/qugag.htm
    Images and data http://www.fs.fed.us/rm/pubs/rmrs_rn037.pdf
    Images and data http://davesgarden.com/guides/pf/go/66280/
    Images and data http://www.swcoloradowildflowers.com/Tree%20Enlarged%20Photo%20Pages/quercus%20gambelii%201.htm
    Nursery Oak Hills Nursery, 13874 Ranchero Road, Oak Hills, 92345, 760-947-6261
    Distribution map http://plants.usda.gov/java/profile?symbol=QUGA