WordNet (r) 3.0 (2006):

black hellebore
    n 1: slightly hairy perennial having deep green leathery leaves
         and flowers that are ultimately purplish-green [syn:
         lenten rose, black hellebore, Helleborus orientalis]
    2: European evergreen plant with white or purplish rose-like
       winter-blooming flowers [syn: Christmas rose, winter
       rose, black hellebore, Helleborus niger]