hogweed

noun3

1. •
   Any coarse weedy herb.
2. •
   An umbelliferous plant, of genus Heracleum, most species of which are phototoxic.

   • “I will bewitch them with flea-bane, blister them with hog-weed,” he said, vainly looking for a suitable spell. — 1970
3. •
   Certain plants from the genera Ambrosia, Erigeron, or Heracleum.