There are two types of poison oak plants, Pacific poison oak and Atlantic poison oak. Pacific poison oak grows in the Western U.S. in a wide range of habitats ranging from grasslands to forests.

There are two types of poison oak plants, Pacific poison oak and Atlantic poison oak. Pacific poison oak grows in the western U.S. in a wide range of habitats ranging from grasslands to forests.

Western poison ivy (Toxicodendron rydbergii) and western poison oak (Toxicodendron diversilobum) are native to California, although poison oak is far more prevalent.

Western poison ivy (Toxicodendron rydbergii) and western poison oak (Toxicodendron diversilobum) are native to California, although poison oak is far more prevalent.

Western poison ivy (Toxicodendron rydbergii) and western poison oak (Toxicodendron diversilobum) are native to California, although poison oak is far more prevalent. The former grows as a vine or ...