Editing Thuja (section)

== Distribution ==
The genus ''Thuja'' has current populations in both North America and East Asia. ''T. plicata'' has wide distribution in the Pacific Northwest from Northern California to Alaska, reaching East into Idaho and central British Columbia. ''T. occidentalis'' has populations in the Northeastern United States, reaching north into Ontario and Quebec, with some distribution as far south as Tennessee.<ref>{{Cite journal|last1=Cowley|first1=Jill|last2=Zheng-yi|first2=Wu|last3=Raven|first3=Peter H.|date=1997|title=Flora of China Volume 15, Myrsinaceae through Loganiaceae|journal=Kew Bulletin|volume=52|issue=3|pages=765|doi=10.2307/4110318|issn=0075-5974|jstor=4110318|bibcode=1997KewBu..52..765C }}</ref>

''T. standishii'' has populations in mountainous regions of Honshu and Shikoku islands in Japan, with no recorded population in the north of the country. ''T. koraiensis'' is native to both North and South Korea and has a small population in the Northern Chinese province of Jilin.<ref name="Cui e0138544">{{Cite journal|last1=Cui|first1=Yi-Ming|last2=Sun|first2=Bin|last3=Wang|first3=Hai-Feng|last4=Ferguson|first4=David Kay|last5=Wang|first5=Yu-Fei|last6=Li|first6=Cheng-Sen|last7=Yang|first7=Jian|last8=Ma|first8=Qing-Wen|date=2015-09-22|title=Exploring the Formation of a Disjunctive Pattern between Eastern Asia and North America Based on Fossil Evidence from ''Thuja'' (Cupressaceae)|journal=PLOS ONE|language=en|volume=10|issue=9|pages=e0138544|doi=10.1371/journal.pone.0138544|issn=1932-6203|pmc=4579098|pmid=26393513|bibcode=2015PLoSO..1038544C|doi-access=free}}</ref> The newly rediscovered species ''T. sutchuenensis'' has extremely limited distribution in the mountains of Chengkou county in southeastern China.