perigonium

from WordNet (r) 3.0 (2006)

perigonium
    n 1: collective term for the outer parts of a flower consisting
         of the calyx and corolla and enclosing the stamens and
         pistils [syn: {perianth}, {chlamys}, {floral envelope},
         {perigone}, {perigonium}]

from The Collaborative International Dictionary of English v.0.48

Perigonium \Per`i*go"ni*um\, n.; pl. {Perigonia}. [NL.]
   Same as {Perigone}.
   [1913 Webster]