Arisaema tortuosum, Arum tortuosum. Arisaemas resemble carnivorous plants, but in fact they attract flies and other insects as pollinators, not food. Their leaves are divided into three or more leaflets. Their fascinating "flower" a pulpit-like hooded spathe enclosing a fleshy, erect spadix usually rises in spring. Edible tuber must be thoroughly dried or cooked before being eaten. These plants prefer a rich but well drained neutral to acid soil that does not dry out in the growing season.