Quercus × alvordiana, the Alvord oak, is a hybrid oak in the genus Quercus. It has been reported to be a hybrid between Quercus douglasii and Quercus turbinella,[1] or between Q. douglasii and Quercus john-tuckeri,[2] [3] which was formerly considered to be a variety of Q. turbinella.[4]
This is the most common hybrid of Q. douglasii. It is endemic to California, where it occurs in the Southern Inner California Coast Ranges and western Transverse Ranges.[5]
Quercus × alvordiana is a shrub or tree under 3m (10feet) tall which may be evergreen or deciduous.
The leaves are up to 5 centimeters long, a dull blue to gray-green on top and paler green on the undersides. The leaf blades have toothed edges and some have pointed tips.
The acorn is narrow in shape and up to 4 centimeters long, with a cup up to 1.6 centimeters wide.[3]