Poison Oak

Poison oak is a native broadleaf shrub of western North America (Washington, Oregon, California) reaching 3-7 ft. It has a variable growth form and produces small inconspicuous yellowish-green flowers in loose clusters from April to June. All parts cause skin irritation on contact.

Poison oak tolerates drought and grows in variable light conditions. It requires active management for removal or control in maintained landscapes. Contact with any part of the plant causes severe allergic reactions in susceptible individuals. Protective equipment is essential when handling or removing.