“Professor Mannhardt relates a strange legend current in Mecklenburg to the effect that in a certain secluded and barren spot, where a murder had been committed, there grows up every day at noon a peculiarly-shaped thistle, unlike any other of its kind. On inspection there are to be seen human arms, hands, and heads, and as soon as twelve heads have appeared, the weird plant vanishes. It is further added that on one occasion a shepherd happened to pass the mysterious spot where the thistle was growing, when instantly his arms were paralysed and his staff became tinder.”

From “The Folk-Lore of Plants“, by T. F. Thiselton-Dyer