Quercus × alvordiana
| Quercus × alvordiana | |
|---|---|
| Scientific classification | |
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| (unranked): | |
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| Species: | Q. × alvordiana
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| Binomial name | |
| Quercus × alvordiana | |
| Synonyms | |
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Quercus dumosa var. alvordiana | |
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]
Distribution
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]
Description
'Quercus × alvordiana is a shrub ot tree under 3 metres (9.8 ft) 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]
Notes
- ^ Quercus × alvordiana. U.S. Department of Agriculture. PLANTS.
- ^ Fryer, J. L. 2007. Quercus douglasii. In: Fire Effects Information System. USDA FS, Rocky Mountain Research Station, Fire Sciences Laboratory.
- ^ a b Quercus × alvordiana. The Jepson Flora Project, Jepson eFlora. 2012.
- ^ Quercus douglasii. Flora of North America.
- ^ Hogan, C. M. 2008. Blue Oak, Quercus douglasii. GlobalTwitcher.com, ed. N. Stromberg.
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