Known in Australia as the horse dung fungus and in Europe as the Bohemian truffle, Pisolithus tinctorius is a widespread earth-ball like fungus, which may in fact be several closely related species. This puffball's black viscous gel is used as a natural dye for clothes. Pisolithus tinctorius is also a major component in Mycorrhizae fungi mixtures that are used in gardening as powerful root stimulators....