Boletus fomentarius

from The Collaborative International Dictionary of English v.0.48

Boletic \Bo*let"ic\, a. (Chem.)
   Pertaining to, or obtained from, the {Boletus}.
   [1913 Webster]

   {Boletic acid}, an acid obtained from the {Boletus
      fomentarius}, variety {pseudo-igniarius}. Same as {Fumaric
      acid}.
      [1913 Webster]