The genus Quercus contains about 500 known species, plus about 180 hybrids between them. The genus, as is the case with many large genera, is divided into subgenera and sections. Traditionally, the genus Quercus was divided into the two subgenera Cyclobalanopsis, the ring-cupped oaks, and Quercus, which included all the other sections. However, a comprehensive revision in 2017 identified different relationships.

  • Quercus hinckleyi <small>C.H.Mull.</small> – Hinckley oak – # Texas, northwestern Mexico
  • Quercus ichnusae <small>Mossa, Bacch. & Brullo</small> – Sardinia
  • Quercus infectoria <small>G.Olivier</small> – Aleppo oak, Cyprus oak – southern Europe, southwestern Asia
  • Quercus insignis <small>M.Martens & Galeotti</small> – Mexico, Belize, Costa Rica, Guatemala, Panama
  • Quercus intricata <small>Trel.</small> – Coahuila scrub oak – # two isolated localities in west Texas, northern Mexico
  • Quercus invaginata <small>Trel.</small> – Mexico
  • Quercus john-tuckeri <small>Nixon & C.H.Mull.</small> – Tucker's oak – California
  • Quercus juergensenii <small>Liebm.</small> – Mexico
  • Quercus kotschyana <small>O.Schwarz</small> – Lebanon
  • Quercus laceyi <small>Small</small> – lacey oak – Edwards Plateau of Texas, northern Mexico
  • Quercus laeta <small>Liebm.</small> – Mexico
  • Quercus lancifolia <small>Schltdl. & Cham.</small> – southwestern North America, Mexico, South America
  • Quercus liebmannii <small>Oerst. ex Trel.</small> — Mexico
  • Quercus lobata <small>Née</small> – valley oak or California white oak – California
  • Quercus lusitanica <small>Lam.</small> – gall oak or Lusitanian oak – Iberia, North Africa
  • Quercus lyrata <small>Walter</small> – overcup oak – eastern North America
  • Quercus × macdonaldii <small>Greene & Kellogg</small> – California
  • Quercus macdougallii <small>Martínez</small> – Mexico
  • Quercus macranthera <small>Fisch. & C.A.Mey. ex Hohen.</small> – Caucasian oak or Persian oak – western Asia
  • Quercus macrocarpa <small>Michx.</small> – bur oak – eastern and central North America
  • Quercus magnoliifolia <small>Née</small> – Mexico
  • Quercus manzanillana <small>Trel.</small> – Mexico
  • Quercus margarettae (also Q.&nbsp;margaretiae and Q.&nbsp;margarettiae) — sand post oak — southeastern North America<!-- spelling of epithet needs sorting; User:Peter coxhead has e-mailed IPNI & PoWO-->
  • Quercus martinezii <small>C.H.Mull.</small> – # Mexico
  • Quercus michauxii <small>Nutt.</small> – swamp chestnut oak – eastern North America
  • Quercus microphylla <small>Née</small> – Mexico
  • Quercus mohriana <small>Buckley ex Rydb.</small> – Mohr oak – # southwestern North America
  • Quercus mongolica <small>Fisch. ex Ledeb.</small> – Mongolian oak – eastern Asia
  • Quercus monnula <small>Y.C.Hsu & H.Wei Jen</small> – south-central China
  • Quercus montana <small>Willd.</small> – chestnut oak – eastern North America (= Quercus prinus)
  • Quercus muehlenbergii <small>Engelm.</small> – Chinkapin oak – eastern, central, and southwestern US (West Texas and New Mexico), northern Mexico
  • Quercus ningqiangensis <small>S.Z.Qu & W.H.Zhang</small> – southeastern China
  • Quercus oblongifolia <small>Torr.</small> – Arizona blue oak, Southwestern blue oak, or Mexican blue oak – # southwestern U.S., northwestern Mexico
  • Quercus obtusata <small>Bonpl.</small> – Mexico
  • Quercus oglethorpensis <small>W.H.Duncan</small> – Oglethorpe oak – southeastern North America
  • Quercus oocarpa <small>Liebm.</small> – Mexico
  • Quercus opaca <small>Trel.</small> – Mexico
  • Quercus pacifica <small>Nixon & C.H.Mull.</small> – # Channel Islands, California
  • Quercus peduncularis <small>Née</small> – # Central America
  • Quercus perpallida <small>Trel.</small> – Mexico
  • Quercus petraea <small>(Matt.) Liebl.</small> – sessile oak, durmast oak – Europe, Anatolia
  • Quercus petraea subsp. polycarpa <small>(Schur) Soó</small> - Georgian oak - Austria to Iran and the Caucasus
  • Quercus petraea subsp. pinnatiloba <small>(K.Koch) Menitsky</small> - Lebanon-Syria, Turkey, South Caucasus
  • Quercus polymorpha <small>Schltdl. & Cham.</small> – Monterrey oak, Mexican white oak – # Mexico and extreme S. Texas
  • Quercus porphyrogenita <small>Trel.</small> – Mexico
  • Quercus potosina <small>Trel.</small> – Mexico
  • Quercus praeco <small>Trel.</small> – Mexico
  • Quercus pringlei <small>Seemen ex Loes.</small> – Mexico
  • Quercus prinoides <small>Willd.</small> – dwarf chinkapin oak – eastern North America
  • Quercus pubescens <small>Willd.</small> – downy oak or Italian oak – Europe, Anatolia
  • Quercus pungens <small>Liebm.</small> – sandpaper oak or pungens oak – southwestern U.S., Mexico
  • Quercus purulhana <small>Trel.</small> – Mexico, Central America
  • Quercus pyrenaica <small>Willd.</small> – Pyrenean oak – southwestern Europe
  • Quercus rekonis <small>Trel.</small> – Mexico
  • Quercus repanda <small>Bonpl.</small> – Mexico
  • Quercus resinosa <small>Liebm.</small> – Mexico
  • Quercus robur <small>L.</small> – pedunculate oak, English oak or French oak – Europe, West Asia
  • Quercus rugosa <small>Née</small> – netleaf oak or Rugosa oak – # southwestern U.S., northwestern Mexico
  • Quercus × schuettei <small>Trel.</small> — Schuette's oak — US, Canada
  • Quercus sebifera <small>Trel.</small> – # Mexico
  • Quercus segoviensis <small>Liebm.</small> – Mexico and northern Central America
  • Quercus serrata <small>Murray</small> – bao li – # China, Taiwan, Japan, Korea
  • Quercus shennongii <small>C.C.Huang & S.H.Fu</small> – southeastern China
  • Quercus shingjenensis <small>Y.T.Chang</small> – China (Guizhou)
  • Quercus similis <small>Ashe</small> – swamp post oak – southeastern North America
  • Quercus sinuata <small>Walter</small> – bastard oak – southern US (formerly identified as Quercus durandii)
  • Quercus sororia <small>Liebm.</small> – Mexico
  • Quercus stellata <small>Wangenh.</small> – post oak – eastern North America
  • Quercus striatula <small>Trel.</small> – Mexico (Sierra Madre Occidental and Mexican Plateau ranges)
  • Quercus subspathulata <small>Trel.</small> – Mexico
  • Quercus supranitida <small>C.H.Mull.</small> – Mexico
  • Quercus tinkhamii <small>C.H.Mull.</small> — Mexico
  • Quercus toumeyi <small>Sarg.</small> — Toumey oak — # southwest New Mexico, southeastern Arizona, northern Mexico
  • Quercus tuberculata <small>Liebm.</small> — Mexico
  • Quercus turbinella <small>Greene</small> — turbinella oak, Arizona Blue Shrub oak, Shrub live oak or scrub live oak — # southwestern North America
  • Quercus vaseyana <small>Buckley</small> — Vasey oak — # southwestern North America
  • Quercus verde <small>C.H.Mull.</small> — Mexico
  • Quercus vicentensis <small>Trel.</small> — El Salvador, Guatemala, and southern Mexico
  • Quercus vulcanica <small>Boiss. & Heldr. ex Kotschy</small> — Kasnak oak — southwestern Asia
  • Quercus welshii <small>R.A.Denham</small> — havard oak, Utah sand oak, wavy leaf oak — # southwestern North America
  • Quercus wutaishanica <small>Mayr</small> — Liaoning oak — China, Mongolia
  • Quercus xylina <small>Scheidw.</small> — Mexico very bitter, inside of acorn shell woolly.
  • Quercus acatenangensis <small>Trel.</small> – Mexico, Guatemala, El Salvador
  • Quercus acerifolia <small>(E.J.Palmer) Stoynoff & W.J.Hess ex R.J.Jensen</small> – maple-leaved oak or mapleleaf oak – Arkansas
  • Quercus acherdophylla <small>Trel.</small> – # Mexico
  • Quercus acutangula <small>Trel.</small> – Mexico
  • Quercus acutifolia, syn. Quercus conspersa — Mexico
  • Quercus aerea <small>Trel.</small> — Mexico
  • Quercus affinis <small>Scheidw.</small> – # Mexico
  • Quercus agrifolia <small>Née</small> – coast live oak – # California, northern Baja California
  • Quercus albocincta <small>Trel.</small> – Mexico (Sierra Madre Occidental)
  • Quercus aristata <small>Hook. & Arn.</small> – Mexico
  • Quercus arkansana <small>Sarg.</small> – Arkansas oak – southeastern North America
  • Quercus benthamii <small>A.DC.</small> – # southern Mexico and Central America
  • Quercus brenesii <small>Trel.</small> – Costa Rica, Mexico
  • Quercus buckleyi <small>Nixon & Dorr</small> – Texas red oak – south central North America
  • Quercus calophylla <small>Schltdl. & Cham.</small> — Mexico
  • Quercus canbyi <small>Trel.</small> (syn. Quercus graciliformis) – Canby oak or Mexican red oak – # Texas, Mexico
  • Quercus castanea <small>Née</small> – # Mexico
  • Quercus charcasana <small>Trel. ex A.Camus</small> – Mexico
  • Quercus chimaltenangana <small>Trel.</small> – Guatemala
  • Quercus coahuilensis <small>Nixon & C.H.Mull.</small> – Mexico
  • Quercus coccinea <small>Münchh.</small> – scarlet oak – eastern North America
  • Quercus coffeicolor <small>Trel.</small> – Mexico
  • Quercus confertifolia <small>Bonpl.</small> (syn. Quercus gentryi) — Mexico
  • Quercus conzattii <small>Trel.</small> – Mexico
  • Quercus cortesii <small>Liebm.</small> – # southern Mexico and Central America
  • Quercus costaricensis <small>Liebm.</small> – # Costa Rica, Panama
  • Quercus crassifolia <small>Bonpl.</small> – Mexico
  • Quercus crassipes <small>Bonpl.</small> – Mexico
  • Quercus crispifolia <small>Trel.</small> — Mexico
  • Quercus crispipilis <small>Trel.</small> – Mexico, Guatemala
  • Quercus cualensis <small>L.M.González</small> – # Mexico (Sierra Madre del Sur)
  • Quercus delgadoana <small>S.Valencia, Nixon & L.M.Kelly</small> – Mexico
  • Quercus depressa <small>Bonpl.</small> – Mexico
  • Quercus devia <small>Goldman</small> – Mexico (Baja California Peninsula)
  • Quercus durifolia <small>Seemen ex Loes.</small> – Mexico (Sierra Madre Occidental)
  • Quercus × dysophylla — Mexico
  • Quercus eduardi <small>Trel.</small> — Mexico
  • Quercus ellipsoidalis <small>E.J.Hill</small> – northern pin oak – eastern North America
  • Quercus elliptica <small>Née</small> – Mexico
  • Quercus emoryi <small>Torr.</small> – Emory oak – # southwestern U.S., northern Mexico
  • Quercus falcata <small>Michx.</small> – southern red oak or Spanish oak – southeastern North America
  • Quercus floccosa <small>Liebm.</small> – Mexico
  • Quercus flocculenta <small>C.H.Mull.</small> — Mexico
  • Quercus fulva <small>Liebm.</small> – Mexico
  • Quercus furfuracea <small>Liebm.</small> – Mexico
  • Quercus galeanensis <small>C.H.Mull.</small> – Mexico
  • Quercus georgiana <small>M.A.Curtis</small> – Georgia oak – southeastern North America
  • Quercus gracilior <small>C.H.Mull.</small> – Honduras
  • Quercus grahamii <small>Benth.</small> – Mexico
  • Quercus gravesii <small>Sudw.</small> – Chisos red oak or Graves oak – Mexico, southwestern North America (Texas)
  • Quercus gulielmi-treleasei <small>C.H.Mull.</small> – Costa Rica to western Panama
  • Quercus hemisphaerica <small>W.Bartram ex Willd.</small> – laurel oak or Darlington oak – # southeastern North America<!-- or syn. w. Q. laurifolia -->
  • Quercus hintonii <small>E.F.Warb.</small> – Mexico
  • Quercus hintoniorum <small>Nixon & C.H.Mull.</small> – # Mexico
  • Quercus hirtifolia <small>M.L.Vázquez, S.Valencia & Nixon</small> – # Mexico
  • Quercus humboldtii <small>Bonpl.</small> – Andean oak – # northern South America (Colombia & Panama)
  • Quercus hypoleucoides <small>A.Camus</small> – silverleaf oak – # southwestern North America
  • Quercus hypoxantha <small>Trel.</small> – # Mexico
  • Quercus ignaciensis <small>C.H.Mull.</small> – Sonora
  • Quercus ilicifolia <small>Wangenh.</small> – bear oak – eastern North America
  • Quercus iltisii <small>L.M.González</small> – western Mexico
  • Quercus imbricaria <small>Michx.</small> – shingle oak – eastern North America
  • Quercus incana <small>W.Bartram</small> – bluejack oak – southeastern North America
  • Quercus inopina <small>Ashe</small> – sandhill oak – Florida
  • Quercus jonesii <small>Trel.</small> – northern Mexico
  • Quercus kelloggii <small>Newb.</small> – California black oak – California, southwestern Oregon
  • Quercus laevis <small>Walter</small> – turkey oak – southeastern North America
  • Quercus laurifolia <small>Michx.</small> – laurel oak – # southeastern North America
  • Quercus laurina <small>Bonpl.</small> – # Mexico
  • Quercus marilandica <small>(L.) Münchh.</small> – blackjack oak – eastern North America
  • Quercus mcvaughii <small>Spellenb.</small> (orth. var. Q.&nbsp;macvaughii) — Mexico (northern and central Sierra Madre Occidental)
  • Quercus mexicana <small>Bonpl.</small> – Mexico
  • Quercus miquihuanensis <small>Nixon & C.H.Mull.</small> – Mexico (Sierra Madre Oriental)
  • Quercus mulleri <small>Martínez</small> – Mexico
  • Quercus myrtifolia <small>Willd.</small> – myrtle oak – # southeastern North America
  • Quercus nigra <small>L.</small> – water oak – # eastern North America
  • Quercus nixoniana <small>S.Valencia & Lozada-Pérez</small> – Mexico
  • Quercus pagoda <small>Raf.</small> – cherrybark oak – southeastern North America
  • Quercus palustris <small>Münchh.</small> – pin oak – eastern North America
  • Quercus panamandinaea <small>C.H.Mull.</small> – Panama
  • Quercus parvula <small>Greene</small> – Shreve oak, Santa Cruz Island oak – # coastal California
  • Quercus paxtalensis <small>C.H.Mull.</small> – Mexico
  • Quercus peninsularis <small>Trel.</small> – Mexico (Baja California)
  • Quercus pennivenia <small>Trel.</small> – Mexico
  • Quercus phellos <small>L.</small> – willow oak – eastern North America
  • Quercus pinnativenulosa <small>C.H.Mull.</small> – Mexico
  • Quercus planipocula <small>Trel.</small> – western Mexico
  • Quercus pumila <small>Walter</small> – runner oak – # southeastern North America
  • Quercus radiata <small>Trel.</small> – Mexico (southern Sierra Madre Occidental)
  • Quercus robusta <small>C.H.Mull.</small> – Chisos Mountains of Texas<!-- may be hybrid of Q. emoryi and Q. gravesii but that sort of information belongs on the species page not here-->
  • Quercus rubra <small>L.</small> – northern red oak – eastern North America
  • Quercus rubramenta <small>Trel.</small> – Mexico
  • Quercus runcinatifolia <small>Trel. & C.H.Mull.</small> – Mexico
  • Quercus rysophylla <small>Weath.</small> – loquat-leaf oak – # Mexico
  • Quercus salicifolia <small>Née</small> – # Mexico
  • Quercus saltillensis <small>Trel.</small> — Mexico
  • Quercus sapotifolia <small>Liebm.</small> – # southern Mexico, Central America
  • Quercus sartorii <small>Liebm.</small> – Mexico
  • Quercus scytophylla <small>Liebm.</small> — Mexico
  • Quercus seemannii <small>Liebm.</small> – southeastern Mexico and Central America
  • Quercus shumardii <small>Buckley</small> – Shumard oak – eastern North America
  • Quercus sideroxyla <small>Bonpl.</small> – Mexico
  • Quercus skinneri <small>Benth.</small> – Mexico (Chiapas, Oaxaca, Tamaulipas, Veracruz) Guatemala, El Salvador, Honduras
  • Quercus tarahumara <small>Spellenb., J.D.Bacon & Breedlove</small> – Mexico
  • Quercus tardifolia <small>C.H.Mull.</small> – lateleaf oak – # two small clumps in Chisos Mountains of Texas
  • Quercus texana <small>Buckley</small> – Nuttall's oak – south central North America (Lower Mississippi River Valley)
  • Quercus tonduzii <small>Seemen</small> – Costa Rica
  • Quercus tuitensis <small>L.M.González</small> — Mexico
  • Quercus urbani <small>Trel.</small> – Mexico
  • Quercus uxoris <small>McVaugh</small> – Mexico
  • Quercus velutina <small>Lam.</small> – black oak or eastern black oak or dyer's oak – eastern North America
  • Quercus viminea <small>Trel.</small> – # Mexico
  • Quercus wislizeni <small>A.DC.</small> – interior live oak – # California
  • Quercus xalapensis <small>Bonpl.</small> – Mexico, Central America

Section Virentes

Section Virentes has also been treated at lower ranks. Species are native south-eastern Northern America, Mexico, the West Indies (Cuba), and Central America.) – # China, Vietnam

  • Quercus austrocochinchinensis <small>Hickel & A.Camus</small> – # Yunnan (China), Thailand, Vietnam
  • Quercus baniensis <small>A.Camus</small> – central Vietnam
  • Quercus bambusifolia <small>Hance</small> – China (Guangdong, Guangxi), northern Vietnam
  • Quercus bella <small>Chun & Tsiang</small> – # China
  • Quercus blakei <small>Skan</small> (syn. Q.&nbsp;chrysocalyx) — # China, Laos, Vietnam
  • Quercus blaoensis <small>A.Camus</small> – southeastern Vietnam
  • Quercus braianensis <small>A.Camus</small> – # Vietnam (endemic)
  • Quercus brandisiana <small>Kurz</small> – upland Indochina, Bangladesh
  • Quercus brevicalyx <small>A.Camus</small> — # China, Laos
  • Quercus breviradiata <small>(W.C.Cheng) C.C.Huang</small> – central and south-central China
  • Quercus cambodiensis <small>Hickel & A.Camus</small> – Cambodia
  • Quercus championii <small>Benth.</small> – # China, Taiwan
  • Quercus chevalieri <small>Hickel & A.Camus</small> – # China, Vietnam
  • Quercus chrysocalyx <small>Hickel & A.Camus</small> – # Vietnam
  • Quercus chrysotricha <small>A.Camus</small> – Borneo (Sarawak)
  • Quercus chungii <small>F.P.Metcalf</small> – # China
  • Quercus ciliaris <small>C.C.Huang & Y.T.Chang</small> – China (Hubei, Sichuan, Zhejiang, Anhui)
  • Quercus daimingshanensis <small>(S.K.Lee) C.C.Huang</small> – # China
  • Quercus dankiaensis <small>A.Camus</small> — # Vietnam (endemic)

</references>