Blue oak

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Blue oak Quercus douglasii


Blue oak Quercus douglasii

A large, deciduous Oak tree, Quercus douglasii, native to southern California. Blue oak produces a strong, durable wood used in furniture, millwork, and flooring.

Synonyms and Related Terms

Quercus douglasii; mountain white oak

Physical and Chemical Properties

Medium trees growing 15-20 m. Bark=rough with deep vertical furrows. Leaves=shiny blue-green with irregular lobes. Fruit=tapering acorns with shallow caps maturing in late summer every year.

Resources and Citations

  • Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996
  • Virginia Tech Dendrology website at (accessed Oct. 8, 2005)
  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976

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