the mistletoe which killed Baldur was ‘too Jung’; hence this clinging parasite could be interpreted as the ‘child of the tree.’ But as the tree signifies the origin in the sense of the mother,
Jung reads the mistletoe in the Baldur myth as the ‘child of the tree’—the forbidden rejuvenating self that the incest prohibition renders lethal—connecting its parasitic nature to fire-mother symbolism and Druidic ritual.
, Symbols of Transformation, 1952thesis