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Toxicodendron rydbergii, the western poison ivy [3] or northern poison oak, is a species of Toxicodendron in the cashew family native to North America. As a poison ivy , it can cause urushiol-induced contact dermatitis .
Greene (synonym Rhus rydbergii) – Western poison ivy is found in northern parts of the eastern United States. It also exists in the western United States and Canada but is much less common than poison oak. It may grow as a vine or a shrub. It was once considered a subspecies of poison ivy. It does sometimes hybridize with the climbing species.
Poison ivy is a type of allergenic plant in the genus Toxicodendron native to Asia and North America. Formerly considered a single species, Toxicodendron radicans , poison ivies are now generally treated as a complex of three separate species: T. radicans , T. rydbergii , and T. orientale .
Here’s how to avoid the itchy rash poison ivy can leave behind.
Poison oak is a leafy shrub that grows in shady areas of your yard where it can reach six feet in height. The leaves and stems of the western poison oak plant (Toxicodendron) can release an oil ...
An expert from Franklin County's Keystone Health shares information about poison ivy, oak and sumac, and the effects of the poisonous plants. Take Care: What you need to know about poison ivy, oak ...
Toxicodendron rydbergii: western poison ivy Anacardiaceae (cashew family) Toxicodendron radicans: eastern poison ivy Anacardiaceae (cashew family) Toxicodendron pubescens: Atlantic poison oak Anacardiaceae (cashew family) Toxicodendron parviflorum: small-flowered poison sumac Anacardiaceae (cashew family) Toxicodendron diversilobum: Pacific ...
The similar species T. diversilobum (western poison oak) and T. rydbergii (western poison ivy) are found in western North America, and T. orientale in Taiwan, Japan, Korea and Sakhalin. T. radicans rarely grows at altitudes above 1,500 m (4,900 ft), although the altitude limit varies in different locations. [5]