Mushrooms and toadstools also symbolize male fertility and virility because of their phallic shape. In China, the mushroom symbolizes long life, happiness and rebirth. Mushrooms are the food of the Taoist immortals. In China, it’s believed the mushroom will only grow in peaceful times, thus it is a symbol of successful government. Some African and Siberian tribes regard mushrooms as symbolic of the human soul, In Mexico, the sacred mushroom signifies knowledge and enlightenment. Some Western myths show fairies and elves sitting on mushrooms and toadstools. 
In literature, a mushroom is considered to be a symbol of immorality and eccentricity. As it lacks leaves and flowers but still resembles a plant it is also considered to be a symbol of peculiarity or strange things. The mushroom symbolizes the occurrence of a situation which will be unexpected and have long lasting effects that are very strange and unthinkable.
Because they grow in the dark they can represent activity happening behind the scenes and secrets. There is an element of the unexpected and paradox. Out of darkness comes life. Mushrooms can also signify growth during dark times in ones life.
They also symbolize spiritual journey-especially by flying reindeer
Protection, because of its umbrella-like shape. Poison in the form of getting rid of negative influences.