{{Short description|Species of oak tree}} {{Speciesbox |image=Quercus buckleyi leaves.jpg |status=LC |status_system=IUCN3.1 |status_ref=<ref name="iucn status 16 November 2021">{{cite iucn |author=Kenny, L. |author2=Wenzell, K. |date=2015 |title=''Quercus buckleyi'' |volume=2015 |article-number=e.T34030A2841110 |doi=10.2305/IUCN.UK.2015-4.RLTS.T34030A2841110.en |access-date=16 November 2021}}</ref> |genus=Quercus |display_parents=2 |parent=Quercus sect. Lobatae |species=buckleyi |authority=Nixon & Dorr |synonyms_ref=<ref name=tpl>{{ThePlantList |id=kew-171890 |taxon=Quercus buckleyi |authority=Nixon & Dorr}}</ref><ref name=taw/> |synonyms=* ''Quercus texana'' <small>Young</small> * ''Quercus rubra'' var. ''texana'' <small>Engelm.</small> }}

'''''Quercus buckleyi''''', commonly known as '''Texas red oak''', '''Buckley's oak''', or '''Spanish oak'''<ref>{{cite web |title=Texas Oak |url=http://texastreeid.tamu.edu/content/TreeDetails/?id=90 |website=Trees of Texas |publisher=Texas A&M Forest Service |access-date=21 June 2023}}</ref><ref>{{cite web |last1=Elmer |first1=Nicole L |title=Trees of BFL: Spanish Oak |url=https://biodiversity.utexas.edu/news/entry/trees-of-bfl-spanish-oak |website=Biodiversity Center |publisher=University of Texas at Austin |access-date=21 June 2023 |archive-date=21 June 2023 |archive-url=https://web.archive.org/web/20230621165303/https://biodiversity.utexas.edu/news/entry/trees-of-bfl-spanish-oak }}</ref> is a species of flowering plant.<ref>[https://books.google.com/books?id=oAAYM9uIPosC&q=Quercus+buckleyi&pg=PA291 Preston, Richard J.; Braham, Richard R. ''Quercus buckleyi''. In: North American trees. Iowa State Press.]</ref><ref>{{PLANTS |symbol=QUBU2 |taxon=Quercus buckleyi}}</ref> It is endemic to the southern Great Plains of the United States (Oklahoma and Texas).<ref>{{BONAP |genus=Quercus |species=buckleyi |date=2014}}</ref>

Buckley's oak is smaller and more likely to be multitrunked than its close relative, the Shumard oak (''Q.&nbsp;shumardii''). The two species are interfertile, and hybrids are common along a line from Dallas to San Antonio, Texas. Texas red oak usually is {{Convert|30 to 50|feet|abbr=off|sp=us}} tall at maturity, and seldom reaches a height of more than 75 feet (23 meters).<ref name=FNA/>

''Quercus buckleyi'' was formerly known as ''Q.&nbsp;texana'', but under botanical rules of priority, that name properly refers to Nuttall's oak.<ref name=taw>[http://www.tropicos.org/NameSearch.aspx?name=Quercus+texana&commonname= Tropicos search for ''Quercus texana'']</ref> This has led to much confusion.<ref name=FNA>{{eFloras|1|233501014|Quercus buckleyi |family=Fagaceae |first=Kevin C. |last=Nixon}}</ref><ref>Dorr, L. J. & K. C. Nixon. 1985. Typification of the oak ''(Quercus)'' taxa described by S.B. Buckley (1809-84). Taxon 34(2): 211–228.</ref>

It is a highly regarded ornamental and shade tree. In autumn, the leaves turn vivid red and orange.{{Cn|date=September 2025}}

==References== {{Reflist}}

==External links== * [http://aggie-horticulture.tamu.edu/ornamentals/natives/quercustexana.htm Horticulture, Texas A&M University, Texas Red Oak] * [http://www.biosurvey.ou.edu/shrub/qubu2.htm Texas Red Oak at the Oklahoma Biological Survey] * [http://www.sbs.utexas.edu/bio406d/images/pics/fag/quercus_buckleyi.htm Texas Red Oak images at Central Texas Plants (University of Texas)] *{{Commons category-inline}}

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buckleyi Category:Endemic flora of the United States Category:Flora of Oklahoma Category:Flora of Texas Category:Flora of the Great Plains (North America) Category:Trees of Northern America Category:Plants described in 1873 Category:Taxonomy articles created by Polbot