The (synonym sect. ''Lepidobalanus''). Europe , Asia , north Africa , North America . Styles short; acorns mature in 6 months, sweet or slightly bitter, inside of acorn shell hairless.
- ''Quercus alba'' - White Oak - eastern North America
- ''Quercus aliena'' - Oriental White Oak - eastern Asia
- ''Quercus arizonica'' - Arizona White Oak # - southwestern North America
- ''Quercus austrina'' - Bluff Oak - southeastern North America
- ''Quercus berberidifolia'' - California Scrub Oak - southwestern North America
- ''Quercus bicolor'' - Swamp White Oak - eastern & midwestern North America
- ''Quercus boyntonii'' - Boynton's Post Oak - south central North America
- ''Quercus chapmannii'' - Chapmann Oak - southeastern North America
- ''Quercus cornelius-mulleri'' - Muller Oak - southwestern North America
- ''Quercus depressipes'' - - Texas
- ''Quercus dilatata'' - Himalaya
- ''Quercus douglasii'' - Blue Oak - southwestern North America
- ''Quercus dumosa'' - Coastal Scrub Oak - southwestern North America
- ''Quercus durata'' - Leather Oak - southwestern North America
- ''Quercus engelmannii'' - Engelmann Oak # - southwestern North America
- ''Quercus faginea'' - Portuguese Oak - southwestern Europe
- ''Quercus fusiformis'' - Texas Live Oak - south central North America
- ''Quercus gambelii'' - Gambel Oak - southwestern North America
- ''Quercus garryana'' - Garry Oak - western North America
- ''Quercus geminata'' - Sand Live Oak # - southeastern North America
- ''Quercus grisea'' - Gray Oak - south central North America
- ''Quercus havardii'' - Sand Shinnery Oak , Shin oak - south central North America
- ''Quercus hinckleyi'' - - Texas
- ''Quercus hondurensis'' - # - Honduras
- ''Quercus ilex'' - Holm Oak # - southern Europe, northwestern Africa
- ''Quercus intricata'' - Texas
- ''Quercus john-tuckeri'' - Tucker's Oak - southwestern North America
- ''Quercus laceyi'' - Lacey Oak - south central North America
- ''Quercus lanata'' - Woolly-leaved Oak # - Himalaya
- ''Quercus leucotrichophora'' - Himalayan Oak # - Himalaya
- ''Quercus lobata'' - Valley Oak or California white oak - southwestern North America
- ''Quercus lyrata'' - Overcup Oak - eastern North America
- ''Quercus macrocarpa'' - Bur Oak - eastern & central North America
- ''Quercus mohriana'' - Mohr Oak - southwestern North America
- ''Quercus michauxii'' - Swamp Chestnut Oak - eastern North America
- ''Quercus minima'' - Dwarf Live Oak # - southeastern North America
- ''Quercus mongolica'' - Mongolian Oak - eastern Asia
- ''Quercus montana'' - Chestnut Oak - eastern North America (syn. ''Q. prinus'')
- ''Quercus muhlenbergii'' - Chinkapin Oak - eastern North America
- ''Quercus oblongifolia'' - Mexican Blue Oak # - western North America
- ''Quercus oglethorpensis'' - Oglethorpe Oak - southeastern North America
- ''Quercus peduncularis'' - # - Central America
- ''Quercus petraea'' - Sessile Oak - Europe
- ''Quercus polymorpha'' - Monterrey Oak # - Mexico & extreme S. Texas
- ''Quercus prinoides'' - Dwarf Chinkapin Oak - eastern North America
- ''Quercus pubescens'' - Downy Oak - Europe
- ''Quercus pungens'' - Sandpaper Oak # - south central North America
- ''Quercus robur'' - Pedunculate Oak , English oak - Europe, West Asia
- ''Quercus rugosa'' - Netleaf Oak # - Mexico
- ''Quercus sadleriana'' - Deer Oak - California
- ''Quercus stellata'' - Post Oak - eastern North America
- ''Quercus toumeyi'' - Toumey Oak - Extreme SW. New Mexico
- ''Quercus turbinella'' - Scrub Live Oak # - southwestern North America
- ''Quercus vaseyana'' - Vasey Oak - southwestern North America
- ''Quercus virginiana'' - Southern Live Oak # - southeastern North America
Europe, Asia, north Africa. Styles long; acorns mature in 6 months, bitter, inside of acorn shell hairless (closely related to sect. ''Quercus'' and sometimes included in it).
Europe, Asia, north Africa. Styles long; acorns mature in 18 months, very bitter, inside of acorn shell hairless or slightly hairy.
The . Southwest USA & northwest Mexico. Styles short, acorns mature in 18 months, very bitter, inside of acorn shell woolly.
- ''Quercus cedrosensis'' - Cedros Island Oak # - Baja California
- ''Quercus chrysolepis'' - Canyon Live Oak # - southwestern North America
- ''Quercus palmeri'' - Palmer Oak # - southwestern North America
- ''Quercus tomentella'' - Island Oak # - southwestern North America
- ''Quercus vacciniifolia'' - Huckleberry Oak # - southwestern North America
The (synonym sect. ''Erythrobalanus''). North, Central & South America. Styles long, acorns mature in 18 months, very bitter, inside of acorn shell woolly.
- ''Quercus acerifolia'' - Maple Leaved Oak , or Mapleleaf oak # - south central North America
- ''Quercus agrifolia'' - Coast Live Oak # - southwestern North America
- ''Quercus arkansana'' - Arkansas Oak - southeastern North America
- ''Quercus buckleyi'' - Buckley Oak - southwestern North America
- ''Quercus canbyi'' - Canby Oak # - Mexico
- ''Quercus coccinea'' - Scarlet Oak - eastern North America
- ''Quercus cualensis'' - Mexico ( Sierra Madre Del Sur )
- ''Quercus depressa'' - Mexico
- ''Quercus eduardii'' - Mexico
- ''Quercus ellipsoidalis'' - Northern Pin Oak - eastern North America
- ''Quercus emoryi'' - Emory Oak - southwestern North America
- ''Quercus falcata'' - Southern Red Oak , or Spanish oak - southeastern North America
- ''Quercus gravesii'' - Chisos Red Oak - Mexico, southwestern North America (Texas)
- ''Quercus graciliformis'' - # - Extreme SW North America
- ''Quercus georgiana'' - Georgia Oak - southeastern North America
- ''Quercus hirtifolia'' - Mexico
- ''Quercus hintoniorum'' - Mexico
- ''Quercus humboldtii'' - South American Oak # - northern South America
- ''Quercus hypoleucoides'' - Silverleaf Oak # - southwestern North America
- ''Quercus hypoxantha'' - Mexico
- ''Quercus ilicifolia'' - Bear Oak - eastern North America
- ''Quercus iltisii'' - Southern Mexico
- ''Quercus imbricaria'' - Shingle Oak - eastern North America
- ''Quercus incana'' - Bluejack Oak - southwestern North America
- ''Quercus inopina'' - # - southeastern North America
- ''Quercus kelloggii'' - California Black Oak - western North America
- ''Quercus laevis'' - American Turkey Oak - southeastern North America
- ''Quercus laurifolia'' - Laurel Oak # - southeastern North America
- ''Quercus laurina'' - Mexico
- ''Quercus marilandica'' - Blackjack Oak - eastern North America
- ''Quercus myrtifolia'' - Myrtle Oak - southeastern North America
- ''Quercus nigra'' - Water Oak # - eastern North America
- ''Quercus palustris'' - Pin Oak - eastern North America
- ''Quercus parvula'' - Island Scrub Oak - California
- ''Quercus phellos'' - Willow Oak - eastern North America
- ''Quercus polymorpha'' - Coahuila Oak # - Mexico
- ''Quercus pumila'' - Runner Oak - southeastern North America
- ''Quercus rhysophylla'' - Loquat-leaf Oak # - Mexico
- ''Quercus rubra'' - Northern Red Oak - eastern North America
- ''Quercus salicifolia'' - Mexico
- ''Quercus sapotaefolia- # - Central America
- ''Quercus shumardii'' - Shumard Oak - southeastern North America
- ''Quercus tardifolia'' - Lateleaf Oak - Extreme S.Texas
- ''Quercus texana'' - Nuttall's Oak - south central North America
- ''Quercus velutina'' - Black Oak - eastern North America
- ''Quercus wislizenii'' - Interior Live Oak # - southwestern North America
- ''Quercus dilatata'' - # - Himalaya (not sure what subgenus)
# Species with Evergreen foliage (" Live Oak s") are tagged #. Note that the change from deciduous to evergreen character (or vice-versa) has evolved on numerous occasions in ''Quercus'', and does not necessarily indicate that the species concerned are closely related.
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