Melanogaster is a rare truffle-like fungi found in Bulgaria and Romania.
Apparently in 2005 an anonymous buyer, from Hong Kong, at a charity auction paid $112,000.00 for a 2.5 pound white truffle.
http://thelongestlistofthelongeststuffa ... ive46.html
And what about the caterpillar fungus that is more valuable than gold selling for $40,000 US dollars per kg !
https://youtu.be/FrO09pQkthQ
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Some may have you believe that the world’s most expensive mushroom is the white truffle. While that rare fungus is truly expensive, it lacks one important quality—it’s not a freakin’ mushroom. Now that we’ve cleared that up, Japan’s matsutake mushroom can take its place as the most expensive mushroom in the world.
The matsutake, or mattake, mushroom is expensive because of its rarity. While its historical prevalence meant it was nearly synonymous with autumn in Japan, the introduction of an insect that kills the trees under which the mushroom grows has caused a dramatic decrease in the number of matsutake mushrooms. A method for farming the matsutake has yet to be developed, which means the lack of trees from which to harvest these mushrooms naturally is a serious problem for the species.
The world’s most expensive mushroom can be purchased for around $1,000 per pound, though prices for specific mushrooms may reach up to $2,000 per pound. It is known more for its spiced, fruity aroma than its flavor and is a cherished gift in the Japanese corporate world.
http://most-expensive.com/mushroom