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{{SPlantbox
{{SPlantbox
|familia=Cupressaceae
|familia=Cupressaceae
|genus=Thuja
|genus=Thuja
|species=koraiensis
|species=koraiensis
|common_name=Korean arborvitae
|common_name=Korean arborvitae
|habit=tree
|Max ht box=30
|Max ht box=30
|Max ht metric=ft
|Max ht metric=ft
|Max wd box=12
|Max wd box=12
|Max wd metric=ft
|Max wd metric=ft
|lifespan=perennial
|life_ref=Flora - A Gardener's Encyclopedia
|exposure=sun
|exposure=sun
|sun_ref=Flora - A Gardener's Encyclopedia
|features=foliage
|Temp Metric=°F
|Temp Metric=°F
|min_zone=5
|min_zone=5
|usda_ref=Flora - A Gardener's Encyclopedia
|max_zone=9
|max_zone=9
|image=Upload.png
|image=Upload.png
|image_width=240
|image_width=240
}}
}}
'''''Thuja koraiensis''''' is a species of ''[[Thuja]]'', native to [[Korea]] and the extreme northeast of [[China]] ([[Changbai Mountains|Changbaishan]]). Its current status is poorly known; the small population in China is protected in the Changbaishan Nature Reserve, as is the small population in [[Soraksan Nature Reserve]] in northern [[South Korea]], but most of the species' range in [[North Korea]] is unprotected and threatened by [[habitat loss]].<ref>Conifer Specialist Group 1998. [http://www.iucnredlist.org/search/details.php/31245/all ''Thuja koraiensis'']. Downloaded on 10 July 2007.</ref><ref name=farjon>Farjon, A. (2005). ''Monograph of Cupressaceae and Sciadopitys''. Royal Botanic Gardens, Kew. ISBN 1-84246-068-4</ref>
It is an [[evergreen]] [[shrub]] or small [[tree]] growing to 3-10 m tall. The foliage forms flat sprays with scale-like [[leaf|leaves]] 2-4 mm long (up to 15 mm long on strong-growing shoots), matt dark green above, and with broad, vivid white [[stoma]]tal wax bands below. The [[conifer cone|cones]] are oval, yellow-green ripening red-brown, 7-11 mm long and 4-5 mm broad (opening to 6-9 mm broad), with 8-12 overlapping scales.<ref name=farjon/>
It is occasionally grown as an [[ornamental tree]] for the contrast between the green upper and bright white lower sides of the foliage, though planting is limited by the low availability of seeds.
==Cultivation==
==Cultivation==