It looks like a piece of Photoshop trickery, but that bit of fairlyand fungus is Entoloma hochstetteri, the Sky Blue Mushroom. In its native New Zealand the mushroom is well known, appearing on a postage stamp and on the back of the country’s $50 note, but it is virtually unheard of outside the Land of the Long White Cloud. The Sky Blue Mushroom is probably poisonous, but no daring forager has offered to find out.