Geastrum

from WordNet (r) 3.0 (2006)

Geastrum
    n 1: type genus of Geastraceae; fungi whose outer peridium when
         dry splits into starlike segments [syn: {Geastrum}, {genus
         Geastrum}]

from The Collaborative International Dictionary of English v.0.48

Geastrum \Geastrum\ prop. n.
   The type genus of the {Geastraceae}, consisting of fungi
   whose outer peridium when dry splits into starlike segments.

   Syn: genus {Geastrum}.
        [WordNet 1.5]