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 ...

Poison ivy produces small, white, or yellow berries, and its leaves turn red in the fall. Poison oak is similar in appearance to poison ivy but is usually found as a shrub rather than a vine.

THE TASTE of young poison oak is surprisingly mild, grassy and only a little bit tart. Two dozen glossy green-and-red leaves ...

Ramah Navajos used a mix of poison ivy sap, deer blood, and charcoal to make poison for arrowheads. Indigenous Americans on the west coast used poison oak leaves in cooking and in addition to using ...

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 ...