Quercus graciliformis

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 canbyi Cory & Parks;

Quercus graciliformis (also known as the Chisos oak or slender oak) is a rare North American species of oak tree in the beech family.^[2]

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.^[3] 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.^[4] It is threatened by habitat loss.^[5]^[6]

It grows on dry, rocky canyon floors at elevations above 5,000 feet (1,500 m).^[3]

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.
^ USDA, NRCS (n.d.). "Quercus graciliformis". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 30 July 2015.
^ ^a ^b 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-1] Beckman, E. (2017). "Quercus graciliformis". IUCN Red List of Threatened Species. 2017: e.T30954A63729730. doi:10.2305/IUCN.UK.2017-2.RLTS.T30954A63729730.en.

[2] USDA, NRCS (n.d.). "Quercus graciliformis". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 30 July 2015.

[efloras-3] 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.

[4] Texas A&M University

[5] 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.

[6] "Quercus graciliformis". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.

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