List of Quercus species

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Contents

Genus Quercus

Subgenus Quercus

Typical oaks. Widespread; acorns not tightly clustered, with scales on acorn cup arranged in spirals.

Section Quercus

The white oaks (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.

Section Mesobalanus

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).

Section Cerris

Europe, Asia, north Africa. Styles long; acorns mature in 18 months, very bitter, inside of acorn shell hairless or slightly hairy.

Section Protobalanus

The intermediate oaks. Southwest USA & northwest Mexico. Styles short, acorns mature in 18 months, very bitter, inside of acorn shell woolly.

Section Lobatae

The red oaks (synonym sect. Erythrobalanus). North, Central & South America. Styles long, acorns mature in 18 months, very bitter, inside of acorn shell woolly.

  • Quercus acerifolia - # - south central North America
  • Quercus agrifolia - Coast live oak # - southwestern North America
  • Quercus arkansana - Arkansas oak - southeastern North America
  • Quercus buckleyi - Texas shumard oak - southwestern North America
  • Quercus canbyi - Canby oak # - Mexico
  • Quercus coccinea - Scarlet oak - eastern North America
  • 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 humboldtii - South American Oak # - northern South America
  • Quercus hypoleucoides - Silverleaf oak # - southwestern North America
  • Quercus ilicifolia - Bear oak - eastern North America
  • 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 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 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 shumardii - Shumard oak - eastern 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

Subgenus Cyclobalanopsis

Missing image
Quercus_kerrii_acorns.jpg
Acorns of a species in subgenus Cyclobalanopsis

Cluster-acorn oaks. A large group of evergreen oaks in east Asia with clustered acorns and the scales on the acorn cups in distinct concrescent rings (see photo, right); often treated as a separate genus Cyclobalanopsis.

Section Cyclobalanopsis

  • Quercus dilatata - # -Himalaya (not sure what subgenus)

Notes

# Species with evergreen foliage ("live oaks") 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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