hogweed

noun

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.”

   “I see the tall not-weeds with white flowers up close. Don’t touch, don’t touch those. Hogweed, it will burn.”

3. Certain plants from the genera Ambrosia, Erigeron, or Heracleum.