The Collaborative International Dictionary of English v.0.48:

Dracocephalum \Dra`co*ceph"a*lum\ prop. n.
   A genus of American herbs and dwarf shrubs of the mind
   family; the dragonheads.

   Syn: genus Dracocephalum.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Dracocephalum
    n 1: genus of American herbs and dwarf shrubs of the mind
         family: dragonheads [syn: Dracocephalum, genus
         Dracocephalum]