Triffid

s were dangerous plants. (PROSE: The Secret in Vault 13) When Sarah Jane Smith told Gita Chandra that her contacts were not usually interested in flowers, Clyde Langer quipped "unless they're Triffids." (TV: Prisoner of the Judoon)

Behind the scenes
Triffids are fictional main antagonists of 's novel. However, it is not stated in-universe whether they are fictional in DWU.