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Philip M. McDonald
Blue oak (Quercus douglasii), named for its blue-green foliage, is also known as iron oak, mountain white oak, or mountain oak. This species is currently underutilized and unmanaged. Silvicultural systems for it are unknown. Blue oak is often found in extensive open stands in the interior foothills where it grows slowly on dry, loamy, gravelly, or rocky soils. It is used locally for fenceposts and fuelwood, and the acorns are an important food for several kinds of wildlife.