Poisonous Plants: Geographic Distribution
Geographic Distribution
One or more of the most common poisonous plant species are found throughout the United States (except Alaska and Hawaii). These plants can be found in forests, fields, wetlands and along streams, road sides, and even in urban environments, such as, parks and backyards.
Poison Ivy
![poison-ivy](/niosh/topics/plants/images/poison-ivy-medium.png?_=19607)
Western poison ivy (left); Eastern poison ivy (right):
Maps courtesy of U.S. Department of Agriculture
Poison Oak
![poison-oak Map of location of Poison Oak](/niosh/topics/plants/images/poison-oak-medium.png?_=19596)
Pacific poison oak (left); Atlantic poison oak (right):
Maps courtesy of U.S. Department of Agriculture
Poison Sumac
![posion-sumac Map of location of Poison Sumac](/niosh/topics/plants/images/posion-sumac-medium.png?_=19598)
Poison Sumac
Maps courtesy of U.S. Department of Agriculture