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][2] or between Q. douglasii and Quercus john-tuckeri,[3][4] which was formerly considered to be a variety of Q. turbinella.[5]
| Quercus × alvordiana | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Fagaceae |
| Genus: | Quercus |
| Species: | Q. × alvordiana
|
| Binomial name | |
| Quercus × alvordiana | |
| Synonyms[1] | |
|
Quercus dumosa var. alvordiana (Eastw.) Jeps. | |
Distribution
editThis is the most common hybrid of Q. douglasii.[citation needed] It is endemic to California, where it occurs in the Southern Inner California Coast Ranges and western Transverse Ranges.[6]
Description
editQuercus × alvordiana is a shrub or 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.[4]
Notes
edit- ^ a b "'Quercus × alvordiana Eastw." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2024-02-19.
- ^ 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. Archived February 28, 2012, at the Wayback Machine GlobalTwitcher.com, ed. N. Stromberg.
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