Also known a "All Heal,” mistletoe is the name for a group of parasitic plants that grows attached to or within the branches of various trees or shrubs. For Druids, it was very sacred and would be harvested using a sacred sickle and caught in a white cloth without touching the ground. Its claimed healing properties may have been overstated. Its leaves and berries are poisonous and extreme care is needed for health purposes. Herbalists have used it for circulatory and respiratory problems. According to Rudolf Steiner it is good for treating cancer. No scientific test has proven is to be effective for any of these purposes.