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 ivy typically has three shiny green leaves (or red in the fall) budding from one small stem. Poison oak also typically comes in leaves of three. What to do if you’re exposed to poison ...