20 of the World's Deadliest Plants
Hogweed
Where it occurs: In temperate regions of Eurasia. One species grows in the USA. It’s a giant and rather impressive-looking plant, but be careful not to take photos of yourselves next to it. Why it is dangerous: Some species contain furanocoumarins that cause painful blistering under sunlight. If some hogweed sap gets on your hand, wash it and protect it from sunlight for about 2 days.
