Editing Oak (section)

==== Subgenus ''Quercus'' ====

{{main|Quercus subg. Quercus|l1=''Quercus'' subg. ''Quercus''}}

* Sect. ''Lobatae'' ([[Synonym (taxonomy)|synonym]] ''Erythrobalanus''), the [[Erythrobalanus|red oaks]] of North America, [[Central America]] and northern [[South America]]. [[Style (botany)|Style]]s are long; the acorns mature in 18 months and taste very bitter. The inside of the acorn shell appears woolly. The actual nut is encased in a thin, clinging, papery skin. The leaves typically have sharp lobe tips, with spiny bristles at the lobe.<ref name=DenkGrimManoDeng17/>
* Sect. ''Protobalanus'', the [[Protobalanus|canyon live oak and its relatives]], in the southwestern [[United States]] and northwest [[Mexico]]. Styles are short; the acorns mature in 18 months and taste very bitter. The inside of the acorn shell appears woolly. The leaves typically have sharp lobe tips, with bristles at the lobe tip.<ref name=DenkGrimManoDeng17/>
* Sect. ''Ponticae,'' a disjunct including just two species. Styles are short, and the acorns mature in 12 months. The leaves have large [[stipule]]s, high secondary veins, and are highly toothed.<ref name=DenkGrimManoDeng17/>
* Sect. ''Virentes,'' the southern live oaks of the Americas. Styles are short, and the acorns mature in 12 months. The leaves are evergreen or subevergreen.<ref name=DenkGrimManoDeng17/>
* Sect. ''Quercus'' (synonyms ''Lepidobalanus'' and ''Leucobalanus''), the [[Lepidobalanus|white oaks]] of [[Europe]], [[Asia]] and North America. Trees or shrubs that produce nuts, specifically acorns, as fruits. Acorns mature in one year for annual trees and two years for biannual trees. Acorn is encapsulated by a spiny cupule as characterized by the family Fagaceae. Flowers in the ''Quercus'' genera produce one flower per node, with three or six styles, as well as three or six [[Ovary (botany)|ovaries]], respectively. The leaves mostly lack a bristle on their lobe tips, which are usually rounded. The type species is ''[[Quercus robur]]''.<ref name=DenkGrimManoDeng17/><ref>{{Cite book |last=Hitchcock |first=C. Leo |url=https://www.worldcat.org/oclc/1027726223 |title=Flora of the Pacific Northwest : an illustrated manual |publisher=University of Washington Press |others=Arthur Cronquist, David Giblin, Ben Legler, Peter F. Zika, Richard G. Olmstead |year=2018 |isbn=978-0-295-74289-2 |edition=Second |location=Seattle |pages=221 |oclc=1027726223}}</ref>