bugbane

from WordNet (r) 3.0 (2006)

bugbane
    n 1: North American plant having large leaves and yellowish
         green flowers growing in racemes; yields a toxic alkaloid
         used medicinally [syn: {white hellebore}, {American
         hellebore}, {Indian poke}, {bugbane}, {Veratrum viride}]
    2: a plant of the genus Cimicifuga having flowers in long
       racemes or panicles reported to be distasteful to insects

from The Collaborative International Dictionary of English v.0.48

Bugbane \Bug"bane`\, n. (Bot.)
   A perennial white-flowered herb of the order
   {Ranunculace[ae]} and genus {Cimiciguga}; bugwort. There are
   several species.
   [1913 Webster]