Planning a hike or a nature walk? You probably know to avoid poison ivy by its distinguishable three leaves on a single stem or stinging nettle by its tiny hair-like projections. But there may be one seemingly innocuous plant not on your radar, as one Facebook post claims. "(It's) about that time of the year again and we are terrified of the kids coming into contact with Wild Parsnip. Please, please be aware of how dangerous this plant really is!" claims the May 31, 2019, post, since shared over 142,000 times on the social media platform. The poster says the yellow flowering plant, resembling an upturned umbrella in accompanying pictures, produces a sap that reacts violently with skin after exposure to sunlight, causing blisters, burns and potentially blindness.