Quercus × alvordiana

Quercus × alvordiana
Scientific classification Edit this 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.

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]

Distribution

This 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

Quercus × 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

  1. ^ a b "'Quercus × alvordiana Eastw." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2024-02-19.
  2. ^ Quercus × alvordiana. U.S. Department of Agriculture. PLANTS.
  3. ^ Fryer, J. L. 2007. Quercus douglasii. In: Fire Effects Information System. USDA FS, Rocky Mountain Research Station, Fire Sciences Laboratory.
  4. ^ a b Quercus × alvordiana. The Jepson Flora Project, Jepson eFlora. 2012.
  5. ^ Quercus douglasii. Flora of North America.
  6. ^ 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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