Toxicodendron radicans | |
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Poison ivy during autumn | |
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Poison ivy in spring, Ottawa, Ontario | |
Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Sapindales |
Family: | Anacardiaceae |
Genus: | Toxicodendron |
Species: | T. radicans
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Binomial name | |
Toxicodendron radicans (L.) Kuntze
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Toxicodendron radicans range map in the United States and Canada | |
Synonyms | |
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Toxicodendron radicans, commonly known as eastern poison ivy[3] or poison ivy, is an allergenic flowering plant that occurs in Asia and eastern North America. The species is well known for causing urushiol-induced contact dermatitis, an itchy, irritating, and sometimes painful rash, in most people who touch it. The rash is caused by urushiol, a clear liquid compound in the plant's sap.[4] The species is variable in its appearance and habit, and despite its common name, it is not a true ivy (Hedera), but rather a member of the cashew and pistachio family (Anacardiaceae). T. radicans is commonly eaten by many animals and the seeds are consumed by birds,[5] but poison ivy is most often thought of as an unwelcome weed. It is a different species from western poison ivy, T. rydbergii, which has similar effects.
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