A helpful old saying is “leaves of three, let it be,” according to the U.S. Centers for Disease Control and Prevention. But poison oak may have more than three leaves, and depending on the ...

but the edges are curved and can grow flowers and berries in clusters close to the leaf. Poison oak will become yellow with ...

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 ...

Indigenous Americans on the west coast used poison oak leaves in cooking and in addition to using the sap to treat warts, rattlesnake bites, and ringworm. Sensitivity to poison ivy can vary from ...

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 ...