Quercus cerris
Common name: 
Turkey Oak
KWER-kus SER-ris
Native to (or naturalized in) Oregon: 
  • Broadleaf deciduous tree, to about 40-60 ft (16-18 m) high and similar spread, double that size in the wild, rounded to conical crown.  Leaves alternate, simple, oval to oblong, 5-12 cm long and 1.5-3 cm wide, tapered to an acute apex, base rounded to truncated, margin lobed, lobes often end with triangular teeth, dark green above, below light green and pubescent (only on veins late), color greenish to yellow-brown in fall.  Acorns in groups of 1-4, to 3.5 cm long, ellipsoid, olive-brown, the cup covers about 1/3 to 1/2 of the acorn, rough (mossy-cup), with spreading or reflexed scales.
  • Sun
  • Hardy to USDA Zone 5      Native to southern Europe and western Asia.
  • cerris: classical Latin for the Turkey oak.
  • Oregon State Univ. campus: Lower Campus, east of 14-15th St. near Monroe Ave.
Click image to enlarge
  • plant habit, spring

    plant habit, spring

  • emerging leaves and male catkins, late spring

    emerging leaves and male catkins, late spring

  • plant habit, summer

    plant habit, summer

  • foliage


  • shoot tip

    shoot tip

  • leaves


  • leaves


  • leaves, variation

    leaves, variation

  • young acorns

    young acorns

  • enlarging acorn

    enlarging acorn

  • maturing acorn

    maturing acorn

  • cap and acorn at drop

    cap and acorn at drop

  • plant habit, young tree in early December

    plant habit, young tree in early December

  • winter twigs, buds

    winter twigs, buds

  • trunk, bark

    trunk, bark