Even if flowerstalks of stelidium are capable of digesting insects, I still do not consider it carnivorous--because it should be the leaves of the plant should be responsible for attraction and capture of insects. Cephalotus, dionaea, drosera, sarracenia, heliamphora, darlingtonia, pinguicula, drosophyllun, utricularia, Byblis, and to some extent, roridula and brochinnia, have all modified their LEAVES to capture prey. Flowerstalks are not leaves, and not the main constituent of a plant. Therefore, eh....
I'll leave my thoughts at that.
I don't see why what part of the plant captures insects is relevant. The point is, THE PLANT captures and digests insects