Plantera's Bulb

Plantera's Bulb is used to spawn the boss Plantera it must be destroyed using a Pickaxe/Drill.

This spawns randomly anywhere in the Underground Jungle after at least one hardmode boss has been killed. It can be seen on your map if you have already explored the Jungle area, making farming Plantera a bit easier as you don't need to re-explore the Underground Jungle between each kill, and shows up as a 4 squares of pink/peach (see screenshots) there CAN be multiple bulbs up at a time. (most I have seen is 4)