Toxicodendron orientale

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.

Toxicodendron orientale
Fukushima Prefecture, Japan
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Sapindales
Family:	Anacardiaceae
Genus:	Toxicodendron
Species:	T. orientale
Binomial name
Toxicodendron orientale Greene

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 3–10 centimetres (1+1⁄4–4 in) 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]}

Examples from Fukushima Prefecture

• 
  Branch underside
• 
  Male flowers
• 
  Female flowers

Taxonomy

The species was first characterized and named by Edward Lee Greene in 1905.^[1]

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.^[2]

Toxicity

All parts of Toxicodendron orientale contain urushiol, which is known to cause severe contact dermatitis.^[3]