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

Western poison ivyexternal icon (left); Eastern poison ivyexternal icon (right):
Maps courtesy of U.S. Department of Agriculture

Poison Oak

Pacific poison oakexternal icon (left); Atlantic poison oakexternal icon (right):
Maps courtesy of U.S. Department of Agriculture

Poison Sumac

Poison Sumacexternal icon
Maps courtesy of U.S. Department of Agriculture