The Collaborative International Dictionary of English v.0.48:

Lunaria \Lunaria\ prop. n.
   A small genus of European herbs of the mustard family,
   including the herb honesty (Lunaria annua), which is also
   called moonwort and lunary.

   Syn: genus Lunaria.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Lunaria annua
    n 1: southeastern European plant cultivated for its fragrant
         purplish flowers and round flat papery silver-white
         seedpods that are used for indoor decoration [syn:
         honesty, silver dollar, money plant, satin flower,
         satinpod, Lunaria annua]