Officials in Virginia are warning residents to be on the lookout after an invasive plant was found Tuesday in the northern part of the state that can cause third-degree burns and even permanent blindness. The Massey Herbarium at Virginia Tech said in a Facebook post that 30 giant hogweed plants were discovered in Clarke County, located between Winchester and Leesburg. The plant contains a very toxic sap, that when combined with sun exposure, can cause severe health hazards. Invasive plant that causes 3rd-degree burns, permanent blindness discovered in Virginia Well if you don't want to believe it be our guest go to Va. find the plant touch it and see what happens. Get back to us let us know how it went.