Triffid

Triffids were a dangerous species of plant-like aliens.

History
A potted, shoulder-length Triffid was present in the Director-General's office. It was the only sign of life. (PROSE: Not So Much a Programme, More a Way of Life)

Behind the scenes
Triffids are fictional main antagonists of 's novel The Day of the Triffids. It seems to be the (likely coincidental) intent that the Triffids are real within in DWU. However, the novel is also established to exist in-universe.