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In terms of its potential to cause urushiol-induced contact dermatitis, poison sumac is far more virulent than other Toxicodendron species, even more virulent than poison ivy and poison oak. According to some botanists, T. vernix is the most toxic plant species in the United States (Frankel, 1991).
The leaves and stems of the western poison oak plant (Toxicodendron) can release an oil called urushiol. It gets on your skin if you touch the plant but some people also breathe in the oil when ...
Unlike Toxicodendron radicans (eastern poison ivy), which often appears as a trailing or climbing vine, T. rydbergii is a shrub that can grow to 1 m (3 ft) tall, rarely up to 3 m (10 ft). The leaves are trifoliate and alternate. The leaflets are variable in size and shape, and are usually 15 cm (6 in) long, turning yellow or orange in autumn.
Toxicodendron diversilobum (syn. Rhus diversiloba), commonly named Pacific poison oak [1] or western poison oak, is a woody vine or shrub in the sumac family, Anacardiaceae. It is widely distributed in western North America, inhabiting conifer and mixed broadleaf forests , woodlands, grasslands, and chaparral biomes. [ 2 ]
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Here's what you need to know about some of the more common plants to stay away from, like poison hemlock, poison ivy and poison oak.
Poison oak refers to two plant species in the genus Toxicodendron, both of which can cause skin irritation: Toxicodendron diversilobum or Pacific poison oak, found in western North America Toxicodendron pubescens or Atlantic poison oak, found in southeastern North America
Mango leaves, stems, peels, and sap contain urushiol, an allergen also present in poison ivy, poison oak, and poison sumac that can cause urushiol-induced contact dermatitis in susceptible people. [citation needed] Cross-reactions between mango contact allergens and urushiol have been observed. Those with a history of poison ivy or poison oak ...