Turn and run, nothing can stop them
Around every river and canal their power is growing
Stamp them out, we must destroy them
They infiltrate each city with their thick dark warning odor
They are invincible
They seem immune to all our herbicidal battering
Long ago in the 
Russian hills
A Victorian explorer found
The regal 
Hogweed by a marsh
He captured it and brought it home
Botanical creature stirs, seeking revenge
Royal beast did not forget
He came home to 
London and made a present of the 
HogweedTo the 
Royal Gardens at 
KewWaste no time, they are approaching
Hurry now, we must protect ourselves and find some shelter
Strike by night they are defenseless
They all need the sun to photo sensitize their venom
Still they're invincible
Still they're immune to all our herbicidal battering
Fashionable country gentlemen had some cultivated wild gardens
In which they innocently planted the giant 
Hogweed throughout the land
Botanical creature stirs, seeking revenge
Royal beast did not forget
Soon they escaped, spreading their seed preparing for an onslaught
Threatening the human race
Mighty Hogweed is avenged
Human bodies soon will know, anger
Kill them with your 
Hogweed hairs
Heracleun 
Mantegazzani