What a generous gift to those little flies! This is Sarracenia flava (yellow pitcher plant), a carnivorous native of the US Southeast Plains in a band from coastal Alabama out to southeastern Virginia. The weird looking things on the left side of the 2nd picture are the old structures for the flowers it previously had before the pitchers fully developed and opened up. (The flowers in question look like this and smell bad.) I’m not terribly sure of what the purple thing is since this is my first time keeping one, maybe that’s what develops into a seed pod? Anyway, seems to be a popular place to chill among the arthropods.

edit: initially botched the photos, maybe this works