Another plant you really want to avoid touching is the wild parsnip. These look related to the aforementioned giant hogweed, ...

Poison ivy (Toxicodendron radicans) is a vine that contains an oily resin known as urushiol. According to the Centers for ...

Poison ivy, poison oak, and poison sumac are three ... The leaves are pinnate, meaning they grow in pairs along a central stem, with 7 to 13 leaflets per leaf. The leaflets are elongated, with ...

Poison oak rash is an allergic reaction to the leaves or stems of the western poison oak ... depending on the time of year. Like poison ivy and poison sumac, poison oak releases an oil called ...