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| Quercus graciliformis | |
|---|---|
| Conservation status | |
 Critically Endangered (IUCN 3.1) | |
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. Lobatae |
| Species: | Q. graciliformis |
| Binomial name | |
| Quercus graciliformis C.H.Mull. | |
| |
| Natural range of Quercus graciliformis | |
| Synonyms | |
| |
Quercus graciliformis (also known as the Chisos oak or slender oak) is a rare North American species of oak tree in the beech family.
Description
Quercus graciliformis is a deciduous tree up to 8 metres (26 ft) tall. Leaves are elliptical or lance-shaped with 8-10 shallow lobes. The acorns are produced biennially.
Distribution
The species has been found only in the Chisos Mountains, within Big Bend National Park of West Texas, and a few miles southeast into the state of Coahuila in northeast Mexico. It is threatened by habitat loss.
It grows on dry, rocky canyon floors at elevations above 5,000 feet (1,500 m).
References
- Beckman, E. (2017). "Quercus graciliformis". IUCN Red List of Threatened Species. 2017: e.T30954A63729730. doi:10.2305/IUCN.UK.2017-2.RLTS.T30954A63729730.en.
- NRCS. "Quercus graciliformis". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 30 July 2015.
- ^ Nixon, Kevin C. (1997). "Quercus graciliformis". 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.
- Texas A&M University
- Nixon, K. et al. 1998. Quercus graciliformis Archived June 27, 2014, at the Wayback Machine. 2006 IUCN Red List of Threatened Species. Archived June 27, 2014, at the Wayback Machine Downloaded on 23 August 2007.
- "Quercus graciliformis". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
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- IUCN Red List critically endangered species
- Quercus
- Endemic flora of Texas
- Flora of Coahuila
- Flora of the U.S. Rio Grande Valleys
- Big Bend National Park
- Plants described in 1934
- Critically endangered flora of North America
- Critically endangered biota of Mexico
- Critically endangered flora of the United States
- Quercus stubs