All parts of the poison oak plant, including the leaves, stems, flowers, roots, and vines, contain an oil known as urushiol. If a person touches the plant or comes into contact with the oil in ...

Poison ivy contains an oil called urushiol, which causes a red, itchy rash when it transfers to the skin. Every part of the plant contains this oil, from the roots to the stem to the leaves ...

Leaves of three, let them be! You've probably heard that little rhyme about poison ivy. But did you know that the plants poison ivy, poison oak, and poison sumac all ... into contact with urushiol or ...