Good grief, it's not only invasive, it's toxic. How did you ever figure that out? "Arum italicum contains cyanogenic glucosides, saponins, and Calcium oxalate crystals, which can cause skin irritations, arrhythmia, and internal bleeding. " I believe it must be a subspecies, Arum Triphyllum (because of the leaf shape) That's the blossom! I'll dig it up right now. It's supposed to have bulbs. Philodendron's have roots. Added later: Yep. Bulb on the bottom and dozens of little ones starting. Added even later: After picking up all the berries from that plant and disposing of them, my fingertips feel dry and rough, like the top layer of skin has worn off. It must be my imagination.