Wild parsnip (Pastinaca sativa) is an invasive plant. It is a native of Eurasia and was first detected in Idaho in 1987.
Wild parsnip slowly invades an area in waves following initial infestation. Once the population builds, it spreads rapidly. This species is an aggressive and can cause phytophotodermatitis to the skin. If the plant juices come in contact with skin in the presence of sunlight, a rash or blistering can occur, as well as skin discoloration that may last several months.