From the Super Mario Wiki
First appearance Wario: Master of Disguise (2007)

A Slithervine is a carnivorous plant in Wario: Master of Disguise. It appears in Sneezemore Cave and Ancient Waterworks. Their ends are purple and short, and the vine is not straight but some green spike balls that are stuck together. Although their description states that they chase their prey relentlessly, Slithervines can't go too far. They are shown to feed on humans.

In-game description[edit]

A carnivorous plant with genetic ties to the same ancestor that snakes descended from. Once prey enters its territory, it will chase it relentlessly.