false hellebore
noun
                                
              
          
                                                      : any of several hellebores of the genus Veratrum                                      
                
                                
            especially                
          
                                                      : one (V. viride) of the eastern United States with dense spikelike flower clusters and a rootstock that has been used medicinally   see american hellebore                                      
            
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  Merriam-Webster unabridged




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