Bladderwort opens wide

BIG MOUTH  The trap of this carnivorous bladderwort is only 1.5 millimeters long, but under a microscope it looks much more menacing. 

I. Siwanowicz/HHMI Janelia Farm Research Campus

Under a microscope, the tiny trap of a carnivorous plant becomes an impressive gaping maw. Rootless and adrift in its wetland habitat, the humped bladderwort (Utricularia gibba) preys on water fleas and other small invertebrates.