The sap of which plant can cause burns?

I worked with a landscape company in British Columbia, Canada. At one time we had to remove giant hogweed. We had to wear haz-mat suits as it's so dangerous and invasive.

return of the giant hogweed, Genesis- early seventies classic.

weedwhacker, they are invincible , they seem immune to our herbicidal battering

Pimpao +, looks like cowslips but way way bigger and taller. it's a reportable plant in the UK, you should note where you've found it and tell the local environmental team about it.

"He came home to London, and made a present of the Hogweed to the Royal Gardens at Kew"