{{short description|Species of flowering plant in the buttercup family}} {{Speciesbox |image = Clematis orientalis (dessin).jpg |taxon = Clematis orientalis |authority= L. }}

'''''Clematis orientalis''''' is a deciduous vine or scrambling shrub in the buttercup family Ranunculaceae, that originates from Asia and Eastern Europe.<ref>{{cite web |title=Clematis orientalis L. {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:60392-2 |website=Plants of the World Online |access-date=9 March 2025 |language=en}}</ref> It was brought to the United States as an ornamental plant but escaped cultivation leading to its classification as a noxious weed in some states. Common names for ''C. orientalis'' include '''Chinese clematis''', '''Oriental virginsbower''', '''orange peel''', and '''orange peel clematis'''.<ref name = Francis>Francis, Frank K. United States. U.S. Department of Agriculture, Forest Service. Clematis orientalis L.. Web. <http://www.fs.fed.us/global/iitf/pdf/shrubs/Clematis orientalis.pdf>.</ref>

==Etymology== The name of the genus ''Clematis'' is a derivation of the Ancient Greek word "clématis", which means "climbing". This is a description of the tendency that species show to be climbers.

==Description== left|thumb| <div style="text-align: center;"> Clematis orientalis mature flower: yellow sepals curled back </div> ''Clematis orientalis'' is a deciduous scrambling shrub that grows to attach to its environment by means of tendril-like stems.<ref name = King>{{cite web |author=King County |title=Noxious Weeds: Oriental clematis. |year=2012 |url=http://www.kingcounty.gov/environment/animalsAndPlants/noxious-weeds/weed-identification/oriental-clematis.asp }}{{Dead link|date=July 2020 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> It grows densely at a rate of least a meter per year.<ref name="King"/>

===Stem=== The stems are slender and tendril-like. It grows to heights of about 2–8 meters, with a thickness up to 7&nbsp;cm. The stems are covered with gray-brown bark, with the inner bark being green.<ref name="Francis"/> The vines twine to rocks, other plants, and other things in its environment as it climbs.

===Flower=== ''C. orientalis'' flowers can be solitary or grow in clusters in a cyme inflorescence. Most noticeable about the flower is the four yellow to yellow-orange sepals, which are often mistaken for its petals. The sepals are ovate-lanceolate to elliptic, wide-spreading and tend to curl back at its maturity. The sepals reaches widths of 2–3&nbsp;cm and lengths of 6–9&nbsp;cm.<ref>Riedl, Harald, and Yasin J. Nasir. "Flora of Pakistan." EFloras. N.p., n.d. Web. 28 Apr 2012. <http://www.efloras.org/florataxon.aspx?flora_id=5&taxon_id=200007697>.</ref> No hair abaxial of sepal.<ref name="Francis"/> The flower is hermaphroditic. The style is 3–10&nbsp;cm long and remains attached to the achene, acting as its wings. The flower has a strong fragrance. right|thumb| <div style="text-align: center;"> Clematis orientalis seedhead </div>

===Leaf=== The leaves are pinnately compound, with 3 to 7 leaflets per leaf. The leaflets are coarsely-toothed to entire or ovate to linear-lanceolate and 1–5&nbsp;cm long. The leaves have a gray-green color.<ref name="Francis"/> The leaves have an opposite arrangement on the stem.

===Root=== ''C. orientalis'' roots are weak and flexible with branching finer roots of tan to orange-tan coloring.<ref name="Francis"/>

==Ecology== ''Clematis orientalis'' prefers well-drained soils. There is no preference of soil texture though does well on chalky soil. Can tolerate a range of alkaline or acidic soils.<ref name = Colorado>Colorado. Colorado Department of Agriculture. Chinese Clematis. Web. <[https://web.archive.org/web/20130408133837/http://www.colorado.gov/cs/Satellite?blobcol=urldata&blobheader=application/pdf&blobkey=id&blobtable=MungoBlobs&blobwhere=1191392899595&ssbinary=true] >.</ref>

It has a preference for sunny habitats but has shown a tolerance for partially shaded areas. In the United States, it is found in shrublands, riverbanks, gullies, sand depressions, riparian forests in hot, dry valleys and desert and semidesert areas.<ref name="Francis"/> It can grow at elevations of 400 to 3,800 meters.<ref name="Francis"/>

==Distribution== right|thumb|250px|<div style="text-align: center;"> Distribution of Clematis orientalis in the United States and Canada </div> ''Clematis orientalis'' is native to Asia and Central Europe, specifically from Turkey through West Asia to the Korean Peninsula, south to Iran, and Northwest India.<ref name="Francis"/>

Originally planted in the United States as an ornamental plant, it escaped from cultivation and became naturalized to Nevada, Idaho, Utah, Colorado, New Mexico, Oregon, and Ontario (Canada).<ref name="King"/>

==Reproduction== left|thumb| <div style="text-align: center;"> Multiple Clematis orientalis seedheads </div> ''C. orientalis'' flowers appear from August to late September. The flowers and fruits are present at the same time. Pollination is carried out by flies and bees.<ref name="Francis"/>

Seedheads are rounded clusters of fluffy winged seeds, resembling pom poms that disperse over winter and early spring.<ref name="King"/> The seeds are primarily dispersed by the wind.

==Impact on habitat== Since ''C. orientalis'' is a vine, it grows over rocks, fences, and other plants. It has escaped cultivation and naturalized. It is classified as a noxious weed by some states. ''C. orientalis'' can cover young trees and bushes, killing them. It has the ability to out-compete native shrubby or herbaceous species.<ref name="Colorado"/>

==Uses== ''Clematis orientalis'' is grown as an ornamental plant. It is also used as an antiseptic and refrigerant. This plant has been documented in Ancient Chinese medicine to treat dog bites and to treat ulcerated throats by gargling its infusion.<ref>."Clematis orientalis&nbsp;– L.." Plants For A Future . N.p., n.d. Web. 28 Apr 2012. <http://www.pfaf.org/user/Plant.aspx?LatinName=Clematis orientalis>.</ref>

==References== {{Reflist}}

==External links== *Plants For A Future: [http://www.pfaf.org/user/Plant.aspx?LatinName=Clematis+orientalis ''Clematis orientalis - L.''] *[http://www.theplantlist.org/tpl/search?q=Clematis+orientalis Kew Plant List] *[https://plants.usda.gov/java/profile?symbol=CLOR USDA Profile] *[http://www.ipni.org/ipni/simplePlantNameSearch.do;jsessionid=D4685D09AA81B0F40385A845C02929FE?find_wholeName=Clematis+orientalis IPNI Listing]

{{Taxonbar|from=Q3281704}}

orientalis Category:Flora of Asia Category:Flora of China Category:Plants described in 1753 Category:Botanical taxa named by Carl Linnaeus