Toxicodendron diversilobum (western poison oak) and Toxicodendron toxicarium (eastern poison oak). There are also two species of poison ivy, Toxicodendron rydbergii, a nonclimbing subshrub ...

poison sumac is only found in the eastern parts of the United States and a few regions in Canada. Poison ivy and poison oak ...

How can you tell if you're dealing with poison oak or poison ivy ... are located may affect where you'll find poison ivy ...