apothecium

from WordNet (r) 3.0 (2006)

apothecium
    n 1: a cuplike ascocarp in many lichens and ascomycetous fungi

from The Collaborative International Dictionary of English v.0.48

Apothecium \Apo`*the"ci*um\, n.; pl. {Apothecia}. [NL.] (Bot.)
   The ascigerous fructification of lichens, forming masses of
   various shapes.
   [1913 Webster] Apothegm