Toxicodendron orientale
{{Short description|Species of flowering plant}}
{{Speciesbox
| image = Toxicodendron orientale 4.JPG
| image_caption = Fukushima Prefecture, Japan
| genus = Toxicodendron
| species = orientale
| authority = Greene
}}
Toxicodendron orientale (Asian poison ivy) is an East Asian flowering plant in the genus Toxicodendron. It is a poison ivy, which can cause urushiol-induced contact dermatitis.
Description
Toxicodendron orientale is a climbing vine that grows on trees or other supports. The deciduous leaves of T. orientale are trifoliate and grow to be {{convert|3-10|cm|frac=4}} in length. Young branches are covered with small brown hairs that turn into red lenticels as the branches mature.
T. orientale flowers from May to June. The small yellow-green flowers grow in groups from the leaf axils. From August to September, the flowers mature into yellow-brown fruit.{{citation needed|date=December 2024}}
{{gallery|mode=packed|title=Examples from Fukushima Prefecture
|Toxicodendron orientale 1.JPG|Branch underside
|Toxicodendron orientale 2.JPG|Male flowers
|Toxicodendron orientale 3.JPG|Female flowers
}}
Taxonomy
The species was first characterized and named by Edward Lee Greene in 1905.{{Citation |last=Greene |first=Edward L. |title=Leaflets of Botanical Observation and Criticism |url=https://www.biodiversitylibrary.org/item/13850#page/1/mode/1up |volume=1 |page=127 |publication-date=1905 |place=Washington, D.C. |language=en |access-date=November 4, 2022}}
Distribution and habitat
It is known to grow in Sakhalin, Japan, Taiwan, South central China, and South Korea. It was introduced to parts of Uzbekistan.{{cite POWO |id=71756-1 |title=Toxicodendron orientale |accessdate=4 November 2022}}
Toxicity
All parts of Toxicodendron orientale contain urushiol, which is known to cause severe contact dermatitis.{{cite web |date=1 January 2022 |title=Urushiol |url=https://pubchem.ncbi.nlm.nih.gov/compound/44144477 |access-date=4 January 2022 |work=PubChem |publisher=US National Library of Medicine}}