Mantrap (Dungeons & Dragons)
The mantrap first appeared in the original first edition Monster Manual II (1983).
The mantrap appeared in second edition Advanced Dungeons & Dragons under the "plant, carnivorous" entry in the Monstrous Compendium Volume Two (1989), and under the "plant, dangerous" entry in the Monstrous Manual (1993).
A mantrap is a giant plant that attracts prey by scent, entrapping and dissolving its victims in acidic secretions. Its pollen causes creatures to become fascinated by the odor, and proceed to the body of the plant and voluntarily climb into one of its leaf traps, which close and firmly entrap the victim.