Quercus × macdonaldii

Quercus × macdonaldii
(Quercus macdonaldii)
Leaves of Quercus ×macdonaldii from an individual on Santa Cruz Island, California
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Fagales
Family: Fagaceae
Genus: Quercus
Species: Q. × macdonaldii
Binomial name
Quercus × macdonaldii
Greene & Kellogg (pro sp.) [1]
Synonyms

Quercus macdonaldii − Greene
Quercus dumosa var. macdonaldii − (Greene & Kellogg) Jeps.

Distribution map for Quercus × macdonaldii,
on the California Channel Islands.

Quercus × macdonaldii,[1][2][3] formerly Quercus macdonaldii, with the common names MacDonald's oak and Macdonald oak, is a rare species of oak in the Fagaceae family.[1]

Distribution

The tree is endemic to the California Channel Islands, on Santa Cruz Island, Santa Rosa Island, and Santa Catalina Island, in Southern California.[2] It is found in chaparral and woodlands habitats in canyons and slopes below 600 metres (2,000 ft).[2]

Quercus × macdonaldii is a Vulnerable species, threatened by habitat loss.[4]

Taxonomy

The plant was reclassified as Quercus × macdonaldii, a naturally occurring hybrid of Quercus pacifica and Quercus lobata, or possibly other oak species.[1][2][3][5]

See also

  • Natural history of the Channel Islands of California

References

  1. 1 2 3 4 ITIS Standard Report Page: Quercus X macdonaldii . accessed 2.28.2015
  2. 1 2 3 4 Jepson: Quercus × macdonaldii . accessed 2.28.2015
  3. 1 2 USDA: Quercus × macdonaldii . accessed 2.28.2015
  4. ↑ IUCN Red List: Quercus macdonaldii; Nixon, K. et al. 1998.
  5. ↑ Kevin, Nixon (2002). "The oak (Quercus) biodiversity of California and adjacent regions" (PDF). Proceedings of the Fifth Symposium on Oak Woodlands: Oaks in California's Challenging Landscape.


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