shiny pacific poison oak toxicodendron diversilobum leaves growing close to the ground, california

allergy america anacardiaceae background branch bright bush california close closeup colorful contrast dangerous detail diversilobum family garden green ground growing infection irritation itchy ivy leaf leaves macro native natural nature new oak oil outdoors pacific plant poison rash reaction serious shiny skin states sumac three toxic toxicodendron united urushiol verdant vibrant vivid west western