What are the walking plants in 'The Day of the Triffids' called?

The walking plants in “The Day of the Triffids” are called triffids.

A triffid is a tall, mobile, carnivorous fictional plant created by British author John Wyndham. In the 1951 novel, triffids become a major threat after a worldwide event leaves most people blind, allowing the plants to spread and attack vulnerable survivors.

The novel suggests that triffids were engineered in the Soviet Union, although their global distribution remains uncertain. Their mobility and poisonous whip-like sting make them especially dangerous, combining the menace of an invasive species with the behavior of a predator.

The 1962 film adaptation changes their origin, presenting them as extraterrestrial organisms transported to Earth by comets. That version is often confused with Wyndham’s original explanation. Morlocks, Selenites, and Martians belong to other works by H. G. Wells, while “triffid” has since entered British English as a humorous term for a large, invasive-looking plant.