Marasmius

from WordNet (r) 3.0 (2006)

Marasmius
    n 1: chiefly small mushrooms with white spores [syn:
         {Marasmius}, {genus Marasmius}]

from The Collaborative International Dictionary of English v.0.48

Marasmius \Marasmius\ prop. n.
   A genus of chiefly small white-spored mushrooms, including
   the {Marasmius oreades}, the mushroon that grow in a {fairy
   ring}.

   Syn: genus {Marasmius}.
        [WordNet 1.5]