Another plant you really want to avoid touching is the wild parsnip. These look related to the aforementioned giant hogweed, ...

In some states, giant hogweed has been deemed a health threat due to its ability to burn and scar skin. Brushing against or breaking the plant releases sap that can cause blistering, and when ...

In short - the sap of giant hogweed can cause burns. It contains furocoumarin, which makes skin extremely sensitive to sunlight. “If the sap gets onto your skin and it's then exposed to the sun ...

Originally from Eurasia, giant hogweed (Heracleum mantegazzianum ... the weed causes a reaction called phytophotodermatitis, leaving burns, blisters, and purplish-black scars in its wake.

Giant hogweed looks like a larger version of Queen ... The oil, when activated by sunlight, causes “severe second-degree burns” and large blisters or ulcers, she said. If that oil is rubbed ...

The Giant Hogweed Mitigation Project’s founder John Kemp learned about the plant — which can grow up to 18 feet tall and ...