pollinium

from WordNet (r) 3.0 (2006)

pollinium
    n 1: a coherent mass of pollen grains (as in orchids)

from The Collaborative International Dictionary of English v.0.48

Pollinium \Pol*lin"i*um\, n.; pl. {Pollinia}. [{NL}. See
   {Pollen}.] (Bot.)
   A coherent mass of pollen, as in the milkweed and most
   orchids.
   [1913 Webster]