A small mobile plant on the planet Phylos whose touch is deadly to humans, which poisons Sulu in the animated episode The Infinite Vulcan.
The retlaw plant is a creeping, mobile plant native to Phylos. It appears in The Animated Series episode The Infinite Vulcan, set in 2269.
While exploring an apparently deserted city, Sulu spots a little plant shuffling along the ground and picks it up. It stings him, and within moments he collapses. McCoy can do nothing against the poison, but Agmar, one of the plant-like Phylosians, appears and cures Sulu with a drop of an antidote his people make. McCoy grumbles that it works rather better than his own medicine.
The episode was written by Walter Koenig, who played Chekov in the live-action series but was not in the animated cast, and the plant's name is his first name spelled backwards.