Poison Oak

Credit: Tualatin Soil and Water Conservation District

Poison Oak is a native plant that grows as a shrub and climbing vine. It can be identified by its 3 shiny green leaflets with lobed edges that resemble oak tree leaves (though it isn’t directly related to oak tree). The leaflets turn red in the fall before falling off. The leaves have a toxic oil which causes severe skin irritation for many people. After coming in contact with poison oak, thoroughly wash the exposed skin with lots of water and soap to remove residual oils and apply a topical treatment such as calamine lotion or hydrocortisone cream. Avoid scratching the rash at all costs. See a doctor if a serious rash develops for professional treatment.