Japanese knotweed
From Jenny Everywhere Wiki
Japanese knotweed was a plant.
In at least one universe, it became an invasive species in the British isles. Jenny Bainbridge was made to watch a public-service announcement video about it at school. She found it dull that it was “just” a fast-growing weed, and not an actual evil plant able to move on its own accord and ensnare victims. (PROSE: The Genesis of Jenny Everywhere)
