poison oak

English

poison oak leaves

Etymology

Its leaves resemble those of the true oaks, and the leaves and twigs contain urushiol, which can cause allergic reactions.

Noun

poison oak (usually uncountable, plural poison oaks)

1. Any of the species of Toxicodendron with compound leaves having three oak-like leaflets, native to North America.

Hyponyms

• Toxicodendron diversilobum, western poison oak
• Toxicodendron pubescens, Atlantic poison oak

Further reading

• Toxicodendron on Wikipedia.Wikipedia
• Toxicodendron on Wikispecies.Wikispecies
• Toxicodendron pubescens on Wikimedia Commons.Wikimedia Commons
• Toxicodendron diversilobum on Wikimedia Commons.Wikimedia Commons
• poison oak at USDA Plants database (T. pubescens)
• poison oak at USDA Plants database (T. diversilobum)