Plantera's Bulb

Plantera's Bulb is used to spawn Plantera. It can be destroyed using any Pickaxe or a Drill. They spawn in random places in the Underground Jungle after one of the mechanical bosses has been defeated, and it's hardmode. It can be seen on your map if you have already explored the Jungle area, making finding these a bit easier. They will respawn after a while, allowing the player to keep summoning Plantera. 1-6 bulbs can be found underground, depending on how many bosses you kill.