Bladderwort

Piney Grove Preserve.

 

Bladderworts are carnivorous plants that use their namesake bladders to kill prey.

 

Glands inside the bladders absorb water and create a partial vacuum. If a small creature brushes certain bristles on the bladder's outside, a door is activated, and water rushes in, carrying the prey item with it. The same water also pushes the door closed again. Other glands then dissolve the prey. Within a couple of hours, a partial vacuum is formed again.

Done