The stomachfern split from the carnofern. Due to the over abundance of twelve-winged worms, it has continued to adapt its digestive system on the underside of its leaves; so much so, that it now has a stomach sac to digest twelve-winged worms. The whip-like leaves snatch them when they either land on or fly by a plant; this is possible because its tiny hairs can sense vibrations in the air. Once grabbed, it will stick the worm in its stomachs, which are located lower on the leaf. It has lost its flowering ability and must reproduce by asexually budding off. It also has developed a thick trunk, in which it can stay dormant during the cold southern winters.