Quercus ajoensis is an uncommon North American shrub with the common name Ajo Mountain shrub oak. It has been found in Arizona mountain ranges of the Colorado desert, and Arizona uplands of the Sonoran Desert.[3][4] Q. ajoensis integrates with Q. turbinella and is difficult to determine specimen identification due to hybridization. It appears that this species is an elevation variant of Q. turbinella and is best treated as a subspecies or variety as it has been treated in the past. The status of Q. ajoensis as a species is probably unnecessary due to complete integration with Q. turbinella or it being a low elevation variant of Q. turbinella.[5]
| Ajo Mountain Shrub oak | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Fagaceae |
| Genus: | Quercus |
| Subgenus: | Quercus subg. Quercus |
| Section: | Quercus sect. Quercus |
| Species: | Q. ajoensis
|
| Binomial name | |
| Quercus ajoensis | |
| |
| Natural range of Quercus ajoensis | |
| Synonyms[2] | |
| |
Q. ajoensis is usually a shrub but occasionally attains the stature of small trees up to 3 metres (10 feet) tall. The leaves are narrowly egg-shaped, up to 5 centimetres (2 inches) long, with sharp pointed teeth.[5]
The species is named for the Ajo Mountains in western Pima County, Arizona, southwest of the town of Ajo. The species does not occur as an identifiable species outside the Ajo mountain range and most specimens are of integrated types with Q. turbinella.[5] The word "ajo" is Spanish for "garlic."
References
edit- ^ Kenny, L.; Wenzell, K.; Jerome, D. (2020). "Quercus ajoensis". IUCN Red List of Threatened Species. 2020: e.T194050A171680879. doi:10.2305/IUCN.UK.2020-2.RLTS.T194050A171680879.en. Retrieved 12 November 2021.
- ^ "Quercus ajoensis C.H.Mull.". World Checklist of Selected Plant Families. Royal Botanic Gardens, Kew – via The Plant List. Note that this website has been superseded by World Flora Online
- ^ SEINet, Southwestern biodiversity, Arizona chapter
- ^ "Quercus ajoensis". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
- ^ a b c Nixon, Kevin C. (1997). "Quercus ajoensis". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 3. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
External links
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