An Estonian fairy tale, this version is from Tales of The Amber Sea, compiled and translated by Irina Zheleznova in 1974.
Once upon a time some men out hunting for mushrooms in the forest found one that was bigger than any they had ever seen before. They began pulling it out of the ground when lo! – a little old man sprang out from under it. No larger than a finger he was with a beard twice that size. The little old man rushed off but the men ran after him. They caught him and asked who he was.
Said the little old man:
“I am king of all the mushrooms growing in this forest.”