And the flowers the predators:
Insects fall to the bottom of the pitcher, where fluid accumulates, in which a whole community of bacteria and mosquito larvae lives. They not only feed on insects that are trapped, but also serve for the external digestion of sarracenia, supplying it with substances that it needs for life. To get out on the slippery surface of the trap pitcher the insect cannot and becomes prey. The plant, in principle, does not feed from the soil; it takes everything it needs when digesting insects and, as a rule, grows in swamps.