Standing 15 to 20 feet tall, giant hogweed towers over most plants. It combines 5-foot wide, irregularly notched, compound leaves with coarse white bristles clumping around its leaf stalks.

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

It's the most dangerous plant in the UK say experts and just brushing it with your arm or leg can give you painful blisters that last for years.

giant hogweed can be identified by its clusters of small white flowers, its hollow stalks covered by coarse hairs and purplish spots and its green, jagged leaves. “It’s a huge plant.

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