Man Eater

Found in the Underground Jungle biome, these plants can easily kill you if caught unaware. Destroying the rock that it's rooted on kills it instantly; this, however, never yields any loot. They can rarely drop a single Vine, needed to craft the Ivy Whip.

They have a limited range, so you can easily sit outside this and pick them off, though it seems the range extends temporarily when hit, so don't sit too close. Their stems are intangible and won't damage nor block you, but are flexible and may shorten unexpectedly, leading the mouth to reach you.

Along with Hornets, they also have a chance of dropping Cobalt Armor pieces.